The 90% confidence interval is approximately 2,400 and 3,400.
The 90% confidence interval of the true population mean can be calculated using the formula: sample mean ± (critical value * standard error). Since the sample size is small (n=27), we need to use the t-distribution and its corresponding critical value. For a 90% confidence level with 26 degrees of freedom (n-1), the critical value is approximately 1.706.
Using the given values, the standard error is calculated as the sample standard deviation divided by the square root of the sample size: 900 / sqrt(27) ≈ 171.97.
Substituting the values into the formula, the 90% confidence interval is approximately 3,000 ± (1.706 * 171.97), which yields a range of approximately 2,424.5 to 3,575.5.
Therefore, the closest option to the 90% confidence interval is 2,400 and 3,400.
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Using π = 3.14, what is the circumference of a circle with a diameter of 28 units?
Round your answer to the nearest hundredth.
A plane is in route to drop off much needed medical supplies to a town. At an altitude of 6.4 miles, it located the town airport at an angle of depression of 7.9 degrees. How many horizontal miles left does the plane need to travel? round to the nearest tenth of a mile.
Answer:
The horizontal distance is 46.1 miles.
Step-by-step explanation:
Here, the given question can be explained by the sides of a right angled triangle. Let x represent the horizontal miles, then applying an appropriate trigonometric function;
Tan θ = [tex]\frac{opposite}{adjacent}[/tex]
Tan [tex]7.9^{o}[/tex] = [tex]\frac{6.4}{x}[/tex]
0.1388 = [tex]\frac{6.4}{x}[/tex]
x = [tex]\frac{6.4}{0.1388}[/tex]
= 46.1095
x = 46.1 miles
The plane needs to travel a horizontal distance of 46.1 miles.
........help me plz plzzzzzzzz
Answer:
a = 42 and B = 50
Step-by-step explanation:
6 x 5 = 30
6 x 7 = 42
B
7 x 10
5 x 10
Answer:
Monkey A ate 42 vegtables and monkey B ate 50 fruits
Step-by-step explanation:
There are 5 blocks of fruits and 7 of vegtables.
Monkey A ate 30 fruits; 30/5 = 6. So that means each block is worth 6 peices of food. And 6x7 = 42.
Monkey B ate 70 vegtables; 70/7 = 10. So that means each block is worth 10 peices of food. And 10x5 = 50
-----------------------------------------------------------------------------------------------------------------
Missing values
Vegtables: 42
Fruit: 50
Show that if U is open in X, and A is closed in X, then U\A is open in X, and A\U is closed in X.
The intersection of N(x) and N'(x), denoted by N(x)∩N'(x), is an open neighborhood of x. Since N(x)∩N'(x) ⊆ N(x) ⊆ U and N(x)∩N'(x) ⊆ N'(x) ⊆ X\U, we can conclude that N(x)∩N'(x) ⊆ UA.
Since N(x)∩A is a non-empty set contained in A\U, we have shown that every point in (A\U)' has a neighborhood contained in A\U. Therefore, (A\U)' is open in X, which implies that A\U is closed in X.
To show that if U is open in X and A is closed in X, then UA is open in X and A\U is closed in X, we need to prove two statements:
UA is open in X.A\U is closed in X.Let's prove these statements one by one:
To show that UA is open in X, we need to prove that for every point x in UA, there exists an open neighborhood around x that is completely contained within UA.Let x be an arbitrary point in UA. Since x is in UA, it must belong to U as well as A. Since U is open in X, there exists an open neighborhood N(x) of x that is completely contained within U. Now, since x is in A, it is also in X\U (complement of U in X). As A is closed in X, X\U is closed in X, which means its complement, U, is open in X. Therefore, there exists an open neighborhood N'(x) of x that is completely contained within X\U.
Now, consider the intersection of N(x) and N'(x), denoted by N(x)∩N'(x). This intersection is an open neighborhood of x. Since N(x)∩N'(x) ⊆ N(x) ⊆ U and N(x)∩N'(x) ⊆ N'(x) ⊆ X\U, we can conclude that N(x)∩N'(x) ⊆ UA.
Since N(x)∩N'(x) is an open neighborhood of x completely contained within UA, we have shown that UA is open in X.
To show that A\U is closed in X, we need to prove that its complement, (A\U)', is open in X.Let x be an arbitrary point in (A\U)'. Since x is not in A\U, it means that x must either be in A or in U (or both). If x is in A, then x is not in A\U. Therefore, x is in U.
Since x is in U and U is open in X, there exists an open neighborhood N(x) of x that is completely contained within U. Now, consider the intersection of N(x) and A. Since x is in A, N(x)∩A is a non-empty set. Let y be any point in N(x)∩A.
We know that N(x)∩A ⊆ U∩A ⊆ A\U, because if y was in U, it would contradict the assumption that y is in A. Therefore, N(x)∩A is a subset of A\U.
Since N(x)∩A is a non-empty set contained in A\U, we have shown that every point in (A\U)' has a neighborhood contained in A\U. Therefore, (A\U)' is open in X, which implies that A\U is closed in X.
Hence, we have shown that if U is open in X and A is closed in X, then UA is open in X, and A\U is closed in X.
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Question 1 of 10
What is the equation of the following line? Be sure to scroll down first to see
all answer options.
(0,0) (10,-2)
The equation of the following line is y= -1/5x.
Option F is correct.
What is Slope?A line's slope is determined by how its y coordinate changes in relation to how its x coordinate changes. y and x are the net changes in the y and x coordinates, respectively. Therefore, it is possible to write the
change in y coordinate with respect to the change in x coordinate as,
m = Δy/Δx where, m is the slope
From the graph we have the coordinates as (0, 0) and (10, -2)
So, the slope of the line is
= (-2 - 0) / (10- 0)
= -2/ 10
= 1-5
and, using the slope intercept is
y= mx+ b
y= -1/5x + b
Now, put x= 0 and y= 0 in above equation
0 = 1/5(0) + b
b= 0
So, the Equation of line is
y= -1/5x
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PLEASE HELP DUE TODAY HELP ASAP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
it's the first one
Step-by-step explanation:
you'd get each output (y) when you subtract 4 from whatever x is
Please help me with this
Answer:with what
Step-by-step explanation:
What is the positive solution to 2x^2=72?
2x^2 = 72
Divide both sides by 2:
X^2 = 36
Take the square root of both sides
X = 6
Mary is using a one-sample t-test on the following group: Subject #15: 7.5 hours Subject #27: 6 hours Subject #48: 7 hours Subject #80:6.5 hours Subject #91: 7.5 hours Subject #82: 8 hours Subject #23:5.5 hours Select the two TRUE statements. a.) The t-distribution that Mary uses has skinnier tails than a standard distribution. b.) The value for the degrees of freedom for Mary's sample population is six. c.) The t-distribution that Mary uses is taller than a standard distribution. d.) Mary would use the population standard deviation to calculate a t- distribution. e.) Mary would use the sample standard deviation to calculate a t-statistic. Teems need to be seleted
The two true statements are: b.) The value for the degrees of freedom for Mary's sample population is six, and e.) Mary would use the sample standard deviation to calculate a t-statistic.
a.) The t-distribution that Mary uses does not have skinnier tails than a standard distribution. In fact, the t-distribution has fatter tails, which accounts for the increased variability when working with small sample sizes.
b.) The degrees of freedom for Mary's sample population can be calculated as the number of subjects minus one, which in this case is 7 - 1 = 6. So statement b is true.
c.) The t-distribution that Mary uses is not taller than a standard distribution. The shape of the t-distribution is similar to the standard normal distribution, but it is slightly flatter.
d.) Mary would not use the population standard deviation to calculate a t-distribution. Instead, she would use the sample standard deviation, which provides an estimate of the population standard deviation.
e.) Mary would use the sample standard deviation to calculate a t-statistic. The t-statistic measures the difference between the sample mean and the hypothesized population mean, relative to the variability in the sample.
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When approximating sof(x)dx using Romberg integration, Rey gives an approximation of order: h10 h8 h4 h6
The order of approximation in Romberg integration is determined by the number of iterations (k) and can be expressed as [tex]2^(2k)[/tex].
When using Romberg integration, the order of approximation refers to the rate at which the error decreases as the step size (h) is reduced. Romberg integration combines the trapezoidal rule with Richardson extrapolation to achieve higher accuracy.
In Romberg integration, the order of approximation is determined by the highest power of h that contributes to the error term. The error term for Romberg integration is typically of the form [tex]O(h^{2n})[/tex], where n is the order of approximation.
The Romberg integration method can achieve various orders of approximation depending on the number of iterations performed. The number of iterations is usually denoted by k, and the order of approximation can be expressed as [tex]2^{2k}[/tex].
So, if Rey gives an approximation of order h10, h8, h4, h6, it means that the Romberg integration method has been applied with different numbers of iterations (k) to achieve different orders of approximation. The higher the order, the more accurate the approximation will be.
It's important to note that Romberg integration is typically denoted by a sequence of numbers, such as R(k, m), where k is the number of iterations and m is the number of function evaluations per iteration. The notation h10, h8, h4, h6 doesn't correspond directly to the traditional Romberg integration notation.
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The equation (x+56)1/2^=x has an extraneous solution.
True or false
9514 1404 393
Answer:
True
Step-by-step explanation:
We assume your equation is intended to be ...
[tex]\sqrt{x+56} =x[/tex]
The usual method of solution squares both sides, then solves the resulting quadratic.
[tex]x+56=x^2\\\\x^2-x-56=0\\\\(x-8)(x+7)=0\longrightarrow x=\{-7,+8\}[/tex]
Considering the initial problem, we require x ≥ 0, so the x=-7 solution is extraneous.
__
A graphical solution shows there is only one value of x that satisfies the equation. The other "solution" arises from considering the negative square root. It is introduced when the equation is squared.
Can someone help me with this. Will Mark brainliest.
Answer:
(7.5, 3)
Step-by-step explanation:
(5,5) and (10, 1)
Midpoint:
[tex](\frac{x1 + x2}{2} ,\frac{y1+y2}{2} )\\\\(\frac{5 + 10}{2} ,\frac{5+1}{2} )\\\\(\frac{15}{2} ,\frac{6}{2} )\\\\(7.5,3)[/tex]
Answer:
it should be (7.5,11.25)
Step-by-step explanation:
I ready linear models choose the line that is the best fit for the data
Answer:
The Answer is lime 2 if not line 4
Step-by-step explanation:
YEp:)
if there is a discordance in the evolution of our genes and culture, why haven’t our genes caught up? how is this related to the concept of "mismatch" posed in the article?
The discordance between the evolution of genes and culture relates to the concept of "mismatch" in the article, highlighting the misalignment between our genetics and the rapidly changing cultural environment.
The discordance between the evolution of genes and culture refers to the fact that human genes evolve slowly over long periods, while cultural changes occur rapidly. This raises the question of why our genes haven't caught up with the cultural changes happening around us. This concept of mismatch is explored in the article to highlight the misalignment between our genetic predispositions and the demands of the rapidly changing cultural environment.
The article likely delves into how this mismatch can lead to various challenges and conflicts, such as the prevalence of modern diseases or psychological conditions arising from the discrepancy between our evolutionary heritage and the cultural context we find ourselves in today. By examining this concept, the article aims to shed light on the potential consequences and implications of the evolutionary-cultural mismatch.
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HELP ME!!!!!!!!!!!!!!!!!!!!!!
Answer:
D
Step-by-step explanation:
The life expectancy of Lagrangian Toads is normally distributed with a mean of 15 years and a standard deviation of 2 years. If we have a population of 1500 Lagrangian Toads, then how many do we expect to live between 9 years and 19 years?
we expect around 1464 Lagrangian Toads to live between 9 years and 19 years.
To solve this problem, we need to calculate the probability that a Lagrangian Toad's life expectancy falls between 9 years and 19 years, given a normal distribution with a mean of 15 years and a standard deviation of 2 years.
First, we calculate the z-scores for the lower and upper bounds of the desired range:
Lower z-score = (9 - 15) / 2 = -3
Upper z-score = (19 - 15) / 2 = 2
Next, we use the z-scores to find the cumulative probability using a standard normal distribution table or calculator.
P(Z < -3) ≈ 0.0013
P(Z < 2) ≈ 0.9772
To find the probability between these two z-scores, we subtract the lower probability from the upper probability:
P(-3 < Z < 2) ≈ 0.9772 - 0.0013 = 0.9759
This means that approximately 97.59% of the Lagrangian Toads in the population are expected to live between 9 years and 19 years.
To find the number of Lagrangian Toads in this range, we multiply the probability by the total population size:
Number of Lagrangian Toads = 0.9759 * 1500 ≈ 1463.85
Rounding to the nearest whole number, we expect around 1464 Lagrangian Toads to live between 9 years and 19 years.
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Prince Ivan rides gray wolf and a constant speed from kings castle to the magic apple garden in five hours. on the return trip to kings castle gray wolf runs at that original constant speed for the first 36 km then runs the rest of the way 3 km/h faster. what was grey Wolf original speed if the return trip took 15 minutes less than the trip from kings castle to magic apple garden?
ahhh i rlly need help with this one haha thanks!!
Answer:
The original speed of the grey wolf can be 9 and/or 48 km/hour
Step-by-step explanation:
There are two trips. One to King Castle (KC) to Magic Apple Garden (MAG), and then back (MAG - KC).
First trip: KC - MAG
It takes the same distance as MAG - KC so distance can be D for both.
Then it is stated that it takes 5 hours or 300mins for him to go from KC - MAG, and the speed is constant.
Let x be speed.
So the equation for this is:
D=5x
Second trip: MAG - KC
Here he goes 36 mi at constant speed (x), then picks up his speed by 3 km/hour (x+3).
For Time:
He reaches to KC, 15 mins earlier than KC - MAG, so he reaches there in 4.75 hours or in 275 min.
The problem splits into two as there are two different times, for the two parts of the journey or distance for MAG - KC.
Let T#1 = a, and T#2 = b.
Let D#2 = D-36
The equation for a:
a = 36/x --> This is he is at a constant speed and went for 36mi.
Next:
The equation for b:
b = (x+3)/D#2
These two equation have to be added as (a+b) = 4.75 --> 4.75 is the total time for MAG - KC.
So the equation is:
36/x + (5x-36)/x+3 = 4.75 --> Knowing (a+b) = 4.75, just put 4.75 as the equal, and add the fractions that equal (a) and (b).
Now Solve:
36/x + (5x-36)/x+3 = 4.75
0.25s^2 + 108 + 5s^2 - 36s = 4.75s*(s+3)
0.25s^2 - 14.25s + 108 = 0
(14.25 +- Square root (203.06 - 108))/0.5
(14.25 +- Square root (95.0625))/0.5
(14.25 +- 9.75)/0.5
Answer:
s = 9, s=48.
Therefore the original speed of the grey wolf can be 9 and/or 48 km/hour.
How many ounces are in 2 1/2 gallons?
Compare each set of rational numbers.
Plz help Major grade 6th grade
Answer:
A. 300h = 900
Step-by-step explanation:
V = lwh
900 = (25)(12)h
900 = 300h
300h = 900
i need to know the answer and the work shown how i got it pleasee help!!!
1/4 of my shirts are red, the rest are blue. Show the ratio of red to blue shirts
Answer:
1:3 red to blue
Step-by-step explanation:
you have x shirts. Let's call the number of red shirts r and the number of blue shirts b.
r = x * 1/4
b = x - r = x - (x * 1/4) = x * 3/4
r:b = (x * 1/4):(x * 3/4) = (1/4):(3/4) = 1:3
Find the volume of the
rectangular prism below
Answer:
480Step-by-step explanation:
multiply all three values
The question is down below, please help me!! I will rate the question 5 stars and give a heart if answered
Answer:
it's 3.12 it's super easy it is 3.12 trust me you won't get it wrong
Can someone please help me with math.
Answer:
A. 20.2 ft.
Step-by-step explanation:
Use the pythagorean theorem to find the missing side length.
a^2+b^2=c^2
11^2+17^2=c^2
PLZ HELP!!!!!!
What is the quotient ? 1 O 73 O 78
sorry im on my school computer so the picture is blocked :(
Answer:
A.) 1/7^8
Step-by-step explanation:
guy in the comments said it and i got it write, so this is for the people that cant see the comments.
Exercise 11.4.7
The following computer output is for an analysis of variance in which yields (bu/acre) of different varieties of oats were compared.
Sums of Mean Source df squares square F ratio Prob
Group 2 76.8950 38.4475 0.40245 0.6801
Error 9 859.808 95.5342
Total 11 936.703
Figure 6: Problem 11.4.7
(a) How many varieties (groups) were in the experiment?
(b) State the conclusion of the ANOVA.
(c) What is the pooled standard deviation, spooled
The values of all sub-parts have been obtained.
(a). There are three varieties were in the experiment.
(b). ANOVA condition has been obtained.
(c). Pooled standard deviation is 9.7742.
What is ANOVA?
To examine how different means differ from one another, analysis of variance is a collection of statistical models and the corresponding estimate techniques. Ronald Fisher, a statistician, created the ANOVA.
(a). Suppose that there are 1 variety or group in the study.
given df (between) = 2 and df (between) = (l - 1).
Therefore,
l = df (between) + 1
l = 2 + 1
l = 3.
(b). In the given ANOVA the p-value (prob = 0.6801) is large enough to accept the null hypothesis thus there is sufficient evidence to conclude that the always yield (bu/acre) of different verities of oats in three groups in same.
(c) Evaluate the pooled standard deviation:
Given MS (with in) = 95.3342 pooled standard deviation is,
Spooled = √(MS (with in))
Spooled = √95.3342
Spooled = 9.7742.
Hence, the values of all sub-parts have been obtained.
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(x – 6)2 = y + 7, find the vertex.
please help!!!! it’s due asapppp !!!!!
a storage container for oil is in the shape of a cylinder with a diameter of 10 ft and a height of 17 ft. Which measurement is closest to the volume of the storage container in cubic feet?
Answer:
1335.18
Step-by-step explanation:
V=π(d/2)2h
Answer:
1335.18
Step-by-step explanation:
V=π(d/2)2h