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Author Question: A statistician consulting for a state department of transportation conducts a study to see if the ... (Read 128 times)

SAVANNAHHOOPER23

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on: Aug 30, 2019

Question 1

Which of the following would increase the power of a test?
I. Increase the sample size
II. Decrease the significance level
III. Increase alpha
◦ II only
◦ I only
◦ I and III
◦ I and II
◦ III only

Question 2

A statistician consulting for a state department of transportation conducts a study to see if the proportion of drivers who are intoxicated has decreased since last year.
H0: The proportion is the same as last year
Ha: The proportion is less than last year.
The P-value of a significance test is greater than the significance level. She can conclude:
◦ the alternative hypothesis is true.
◦ there is enough evidence to reject the null hypothesis.
◦ the test was too powerful.
◦ there is not enough evidence to reject the null hypothesis.
◦ the null hypothesis is true.
Stats: Modeling the World ¦ Bock, Velleman, De Veaux ¦ 4th Edition
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Marked as best answer by SAVANNAHHOOPER23 on Aug 30, 2019

asdfasdf

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Reply #1 on: Aug 30, 2019
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SAVANNAHHOOPER23

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Reply #2 on: Aug 30, 2019
Excellent


asdfasdf

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Reply #3 on: Aug 30, 2019
Great! Please up vote :D


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