Suppose that, on average, U.S. adults get fast food 10 times a week. In a random sample of 41 people, it was found that they ordered fast food an average of 9 times in one week. Assume the population standard deviation is 4.4. Perform a test at a significance level of 5% to determine whether or not the number of times a U.S. adult gets fast food in a week is different from 10.
Suppose that, on average, U.S. adults get fast food 10 times a week. In a random sample of 41 people, it was found that they ordered fast food an average of 9 times in one week. Assume the population standard deviation is 4.4. Perform a test at a significance level of 5% to determine whether or not the number of times a U.S. adult gets fast food in a week is different from 10.
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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Transcribed Image Text:Suppose that, on average, U.S. adults get fast food 10 times a week. In a random sample of 41 people, it was found that they ordered fast food an average of 9 times in one week. Assume the population standard deviation is 4.4. Perform a test at a significance level of 5% to determine whether or not the number of times a U.S. adult gets fast food in a week is different from 10.
a. Check all of the requirements that are satisfied.

Transcribed Image Text:### Statistical Analysis: Decision Making in Hypothesis Testing
**g. Critical Value Determination**
- Task: Find the critical value. Round your answer to two decimal places.
- Answer: ______
**h. Decision on the Null Hypothesis**
- Choose the correct decision based on your calculations:
- O Reject the null hypothesis since p-value ≤ α
- O Do not reject the null hypothesis since p-value > α
- O Reject the null hypothesis since the test statistic is inside the critical region
- O Do not reject the null hypothesis since the test statistic is outside the critical region
**i. Interpretation of Results**
- Select the statement that best represents the interpretation of the results:
- O There is sufficient evidence to support the claim that the amount of times U.S. adults order fast food is different than 10.
- O There is not sufficient evidence to support the claim that the amount of times U.S. adults order fast food is different than 10.
- O The sample data support the claim that U.S. adults get fast food 10 times a week.
- O We accept the claim that U.S. adults get fast food 10 times a week.
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