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The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. To determine whether there has been a decrease in the average number of customers visiting the dealership daily, the appropriate hypotheses are ____

The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. To determine whether there has been a decrease in the average number of customers visiting the dealership daily, the appropriate hypotheses are ____

MATLAB: An Introduction with Applications
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 owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 350. To determine whether there has been a decrease in the average number of customers visiting the dealership daily, the appropriate hypotheses are __________.

A company decided to test the hypothesis that the average time a company's employees are spending to check their private emails at work is more than 6 minutes. A random sample of 40 employees were selected and they averaged 6.6 minutes. It is believed that the population standard deviation is 1.7 minutes. The alpha (α) is set to 0.05. The p-value for this hypothesis test would be __________. **Multiple Choice Options:** - ○ 0.0268 - ○ 0.0395 - ○ 0.0644 - ○ 0.0128 **Explanation:** This test involves determining whether the average time spent is greater than 6 minutes using a one-sample z-test, with the population standard deviation known and a sample size of 40. The selection of the p-value will help determine whether to reject the null hypothesis based on the significance level (α = 0.05). The correct p-value indicates the probability of observing the test statistic under the null hypothesis.
Transcribed Image Text:A company decided to test the hypothesis that the average time a company's employees are spending to check their private emails at work is more than 6 minutes. A random sample of 40 employees were selected and they averaged 6.6 minutes. It is believed that the population standard deviation is 1.7 minutes. The alpha (α) is set to 0.05. The p-value for this hypothesis test would be __________. **Multiple Choice Options:** - ○ 0.0268 - ○ 0.0395 - ○ 0.0644 - ○ 0.0128 **Explanation:** This test involves determining whether the average time spent is greater than 6 minutes using a one-sample z-test, with the population standard deviation known and a sample size of 40. The selection of the p-value will help determine whether to reject the null hypothesis based on the significance level (α = 0.05). The correct p-value indicates the probability of observing the test statistic under the null hypothesis.
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