Assume you choose a level of significance of α=0.05, what is the critical value? Assume you choose a level of significance of a = 0. 05, what is the critical value?O 1.711O 2.512O 1.318O 2.064 The average student studies eight hours for a statistics exam and receives a grade ofµ = 84. In a sample of 25 students who study twelve hours for a statistics examyou find that the average grade is I = 87. You want to test the hypothesis thatstudying twelve hours statistically significantly increases academic performance.

The random variable studying twelve hours follows normal distribution. We have to find the critical…

Answered: The average student studies eight hours…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The test statistic of z=−1.61 is obtained when testing the claim that p<0.69. a. Using a significance level of α=0.10, find the critical value(s). b. Should we reject H0 or should we fail to reject H0?
Find the indicated critical value of 0.02
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 99% confident that your estimate is within 3% of the true population proportion. How large of a sample size is required? n = Do not round mid-calculation. However, use of a critical value rounded to three decimal places will suffice.
Do one of the following, as appropriate: (a) Find the critical value za/2, (b) find the critical value ta/2, (c) state that neither the normal nor the t distribution applies. 98%; n = 7; 0 = 27; population appears to be normally distributed. Seleccione una: O A. Za2 = 2.33 B. Za2 = 2.05 C. ta2 = 2.575 %3D D. ta2 = 1.96 O O
The test statistic of z=−3.21 is obtained when testing the claim that p<0.79. a. Using a significance level of α=0.05, find the critical value(s). b. Should we reject H0 or should we fail to reject H0?
The test statistic of z = −1.55 is obtained when testing the claim that p = 1/4. Using a significance level of α = 0.10, find the critical value(s). Should we reject H0 or should we fail to reject H0?
We want to estimate the percentage of all college students that like the food in their cafeteria. How many students must we survey if we want to be 90% confident that the sample percentage is within four percentage points of the true population percentage? a. What is the value of the critical value? z Subscript alpha divided by 2 Baseline equals nothing b. What is the desired margin of error? E = nothing (enter a decimal with 2 decimal places) c. What is the sample size? n = nothing (enter a whole number) d. Does the size of the population affect the sample size? A. No, N, the population size, does not appear in the formula. B. Yes, the bigger the population, the bigger the sample size. C. No, the sample size is only affected by the margin of error. D. Yes, the sample size must be 90% of the population size.
please solve all asap
What are the two critical values? Round to three or more decimal places.
The test statistic of z=−2.31 is obtained when testing the claim that p=1/2. a. Using a significance level of α=0.05,find the critical value(s). b. Should we reject H0 or should we fail to reject H0?
For the following claim, find the critical value. Assume that a simple random sample has been selected from a normally distributed population. Claim: The mean IQ score of statistics professors is greater than 130 Sample data: n= 28, x= 123, s=6. The significance level is a = 0.01.
The test statistic of z=−2.80 is obtained when testing the claim that p<0.47. a. Using a significance level of α=0.05, find the critical value(s). b. Should we reject H0 or should we fail to reject H0?

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