In a study of memory recall, 8 students from a large psychology class were selected at random and given 10 minutes to memorize a list of 20 nonsensical words. Each was asked to list as many of the words as he or she could remember both 1 hour and 24 hours later. The data are as shown in the accompanying table. Student 1 2 3 4 5 6 7 8 1 hour later 16 13 20 9 11 11 17 15 24 hours later 11 4 15 7 8 7 12 11 Use these data to estimate the difference in mean number of words remembered after 1 hour and after 24 hours. Use a 90% confidence interval. (Use ?d = ?1 hour later − ?24 hours later. Use a table or technology. Round your answers to two decimal places.) , words
In a study of memory recall, 8 students from a large psychology class were selected at random and given 10 minutes to memorize a list of 20 nonsensical words. Each was asked to list as many of the words as he or she could remember both 1 hour and 24 hours later. The data are as shown in the accompanying table. Student 1 2 3 4 5 6 7 8 1 hour later 16 13 20 9 11 11 17 15 24 hours later 11 4 15 7 8 7 12 11 Use these data to estimate the difference in mean number of words remembered after 1 hour and after 24 hours. Use a 90% confidence interval. (Use ?d = ?1 hour later − ?24 hours later. Use a table or technology. Round your answers to two decimal places.) , words
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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In a study of memory recall, 8 students from a large psychology class were selected at random and given 10 minutes to memorize a list of 20 nonsensical words. Each was asked to list as many of the words as he or she could remember both 1 hour and 24 hours later. The data are as shown in the accompanying table.
| Student | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 1 hour later | 16 | 13 | 20 | 9 | 11 | 11 | 17 | 15 |
| 24 hours later | 11 | 4 | 15 | 7 | 8 | 7 | 12 | 11 |
Use these data to estimate the difference in mean number of words remembered after 1 hour and after 24 hours. Use a 90% confidence interval. (Use
?d = ?1 hour later − ?24 hours later.
Use a table or technology. Round your answers to two decimal places.)Expert Solution
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