researcher believes there is a difference in the mean number of days before visible results begin to show among three types of facial creams that reduce wrinkle li everal consumers are randomly selected and given one of the three creams. Each participant then recorded the number of days it took to see results. The results ar hown in the table. Based on these data, can you conclude that there is a difference between the mean number of days for these three creams? Use a 0.05 level of gnificance and assume the population distributions are approximately normal with equal population variances. Cream #1 14 10 11 12 12 Cream #2 11 11 11 20 11 Cream #3 16 17 15 21 19
researcher believes there is a difference in the mean number of days before visible results begin to show among three types of facial creams that reduce wrinkle li everal consumers are randomly selected and given one of the three creams. Each participant then recorded the number of days it took to see results. The results ar hown in the table. Based on these data, can you conclude that there is a difference between the mean number of days for these three creams? Use a 0.05 level of gnificance and assume the population distributions are approximately normal with equal population variances. Cream #1 14 10 11 12 12 Cream #2 11 11 11 20 11 Cream #3 16 17 15 21 19
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
Related questions
Question
Step 2 of 2: Interpret this and decide to reject/fail to reject? Is there sufficient or insufficient evidence?
![A researcher believes there is a difference in the mean number of days before visible results begin to show among three types of facial creams that reduce wrinkle lines.
Several consumers are randomly selected and given one of the three creams. Each participant then recorded the number of days it took to see results. The results are
shown in the table. Based on these data, can you conclude that there is a difference between the mean number of days for these three creams? Use a 0.05 level of
significance and assume the population distributions are approximately normal with equal population variances.
Cream #1
14
10
11
12
12
Cream #2
11
11
11
20
11
Cream #3
16
17
15
21
19
14
Copy Data
Step 1 of 2: Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to four decimal
places.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F06d12251-c043-485e-94d6-68a1cef27ba5%2F34a5bd33-c7f8-4eb3-b4c7-e18c85f879ff%2Fushitb9_processed.png&w=3840&q=75)
Transcribed Image Text:A researcher believes there is a difference in the mean number of days before visible results begin to show among three types of facial creams that reduce wrinkle lines.
Several consumers are randomly selected and given one of the three creams. Each participant then recorded the number of days it took to see results. The results are
shown in the table. Based on these data, can you conclude that there is a difference between the mean number of days for these three creams? Use a 0.05 level of
significance and assume the population distributions are approximately normal with equal population variances.
Cream #1
14
10
11
12
12
Cream #2
11
11
11
20
11
Cream #3
16
17
15
21
19
14
Copy Data
Step 1 of 2: Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to four decimal
places.
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