The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 1414 days of application. To test the claim, 10 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participant’s eyes is recorded before and after the 14 days of treatment. The following table displays the results. Test the claim at the 0.01 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 1 and let women after the treatment be Population 2. Number of Fine Lines and Wrinkles Before 13 14 10 15 15 9 10 14 9 10 After 11 14 11 14 14 8 11 12 5 7 Step 2 of 3 : Compute the value of the test statistic. Round your answer to three decimal places. Step 3 of 3: Reject or fail? Is there enough evidence
The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 1414 days of application. To test the claim, 10 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participant’s eyes is recorded before and after the 14 days of treatment. The following table displays the results. Test the claim at the 0.01 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 1 and let women after the treatment be Population 2. Number of Fine Lines and Wrinkles Before 13 14 10 15 15 9 10 14 9 10 After 11 14 11 14 14 8 11 12 5 7 Step 2 of 3 : Compute the value of the test statistic. Round your answer to three decimal places. Step 3 of 3: Reject or fail? Is there enough evidence
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 1414 days of application. To test the claim, 10 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participant’s eyes is recorded before and after the 14 days of treatment. The following table displays the results. Test the claim at the 0.01 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 1 and let women after the treatment be Population 2.
Number of Fine Lines and Wrinkles
| Before | 13 | 14 | 10 | 15 | 15 | 9 | 10 | 14 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| After | 11 | 14 | 11 | 14 | 14 | 8 | 11 | 12 | 5 | 7 |
Step 2 of 3 :
Compute the value of the test statistic. Round your answer to three decimal places.
Step 3 of 3: Reject or fail? Is there enough evidence
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