One-tailed O Two-tailed Step 2: Enter the critical value(s). (Round to 3 decimal places.) Step 3: Enter the test statistic. (Round to 3 decimal places.) 0.3+ 0.2+ (c) Based on your answer to part (b), choose what can be concluded, at the 0.05 level of significance, about the claim made by the chain of restaurants. O Since the value of the test statistic lies in the rejection region, the null hypothesis is rejected. So, there is enough evidence to conclude that the mean wait time is now greater than 10 minutes. 0.1+ O Since the value of the test statistic lies in the rejection region, the null hypothesis is not rejected. So, there is not enough evidence to conclude that the mean wait time is now greater than 10 minutes. Explanation O Since the value of the test statistic doesn't lie in the rejection region, the null hypothesis is rejected. So, there is enough evidence to conclude that the mean wait time is now greater than 10 minutes. Check O Since the value of the test statistic doesn't lie in the rejection region, the null hypothesis is not rejected. So, there is not enough evidence to conclude that the mean wait time is now greater than 10 minutes. Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use S And Privacy Center | Accessibility
One-tailed O Two-tailed Step 2: Enter the critical value(s). (Round to 3 decimal places.) Step 3: Enter the test statistic. (Round to 3 decimal places.) 0.3+ 0.2+ (c) Based on your answer to part (b), choose what can be concluded, at the 0.05 level of significance, about the claim made by the chain of restaurants. O Since the value of the test statistic lies in the rejection region, the null hypothesis is rejected. So, there is enough evidence to conclude that the mean wait time is now greater than 10 minutes. 0.1+ O Since the value of the test statistic lies in the rejection region, the null hypothesis is not rejected. So, there is not enough evidence to conclude that the mean wait time is now greater than 10 minutes. Explanation O Since the value of the test statistic doesn't lie in the rejection region, the null hypothesis is rejected. So, there is enough evidence to conclude that the mean wait time is now greater than 10 minutes. Check O Since the value of the test statistic doesn't lie in the rejection region, the null hypothesis is not rejected. So, there is not enough evidence to conclude that the mean wait time is now greater than 10 minutes. Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use S And Privacy Center | Accessibility
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Transcribed Image Text:L
ALEKS-Ayishatu Bature - Learn
O CONFIDENCE INTERVALS AND HYPOTHESIS TESTING
Introduction to hypothesis tests for the population mean using...
✓ One-tailed
O Two-tailed
Step 2: Enter the critical value(s).
(Round to 3 decimal places.)
Step 3: Enter the test statistic.
(Round to 3 decimal places.)
www-awu.aleks.com
BIG Corporation advertises that its light bulbs have a mean lifetime, u, of at least 2...
0.2+
0.1+
Explanation
O Since the value of the test statistic lies in the rejection region, the null hypothesis is not rejected. So, there is not t
enough evidence to conclude that the mean wait time is now greater than 10 minutes.
O Since the value of the test statistic doesn't lie in the rejection region, the null hypothesis is rejected. So, there is
enough evidence to conclude that the mean wait time is now greater than 10 minutes.
Check
(c) Based on your answer to part (b), choose what can be concluded, at the 0.05 level of significance, about the claim made by the chain of restaurants.
O Since the value of the test statistic lies in the rejection region, the null hypothesis is rejected. So, there is enough.
evidence to conclude that the mean wait time is now greater than 10 minutes.
▬▬▬ 1/5
O Since the value of the test statistic doesn't lie in the rejection region, the null hypothesis is not rejected. So, there is
not enough evidence to conclude that the mean wait time is now greater than 10 minutes.
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Transcribed Image Text:1
Introduction to hypothesis tests for the population mean using...
A chain of restaurants has historically had a mean wait time of 10 minutes for its customers. Recently, the restaurant added several very popular dishes back to
their menu. Due to this, the manager suspects the wait time, μ, has increased. He takes a random sample of 41 customers. The mean wait time for the sample
is 10.3 minutes. Assume the population standard deviation for the wait times is known to be 2.8 minutes.
Can the manager conclude that the mean wait time is now greater than 10 minutes? Perform a hypothesis test, using the 0.05 level of significance.
(a) State the null hypothesis Ho and the alternative hypothesis H₁.
Ho:
H₁:0
C
Standard Normal Distribution
Step 1: Select one-tailed or two-tailed.
O One-tailed
OTwo-tailed
Explanation
2
(b) Perform a hypothesis test. The test statistic has a normal distribution (so the test is a "Z-test"). Here is some other information to help you with your
test.
• 20.05 is the value that cuts off an area of 0.05 in the right tail.
• The test statistic has a normal distribution and the value is given by z=
Check
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