10. In a study to investigate whether lack of sleep hurts short-term memory, 10 adults were each tested twice. Both times they studied a list of 30 words for two minutes, and were then asked to recall as many as possible, with a different but comparable list used each time. For one of the two tests they had been without sleep for 24 hours, while for the other they had a normal amount of sleep. The order was randomly assigned. The difference in number of words recalled (with sleep - without sleep) was recorded for each person. The results are given in the table on the right. Does the lack of sleep decrease short term memory ? (Use a= 0.05). with sleep without sleep 23 18 29 20 14 10 21 25 24 22 29 27 28 17 21 20 30 25 26 21 (A) Yes (B) No

10. In a study to investigate whether lack of sleep hurts short-term memory, 10 adults were each tested twice. Both times they studied a list of 30 words for two minutes, and were then asked to recall as many as possible, with a different but comparable list used each time. For one of the two tests they had been without sleep for 24 hours, while for the other they had a normal amount of sleep. The order was randomly assigned. The difference in number of words recalled (with sleep - without sleep) was recorded for each person. The results are given in the table on the right. Does the lack of sleep decrease short term memory ? (Use a= 0.05). with sleep without sleep 23 18 29 20 14 10 21 25 24 22 29 27 28 17 21 20 30 25 26 21 (A) Yes (B) No

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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