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3. Variability and inferential statistics wo researchers, Dr. Kim and Dr. William, are studying the relationship between how many minutes per day a child spends on a computer and how hany words per minute the child can type. Each researcher compares two samples of 50 fifth grade students. One sample spends less time on a omputer, the other spends more time. The following table shows the mean and standard deviations of words per minute the child can type, as they night be shown in a journal article. Researcher: Dr. Kim Researcher: Dr. William Sample A Spends less than 15 minutes on a computer per day (M = 22.16, SD = 10.06) Spends 15-30 minutes on a computer per day (M = 24.66, SD = 8.79) Sample B Spends more than 15 minutes on a computer per day (M= 28.34, SD = 11.12) Spends more than 30 minutes on a computer per day (M = 30.84, SD = 9.15) he summary data from study demonstrates a stronger relationship between how many minutes per day a child spends on a omputer and how many words per minute the child can type. (Hint: Consider the magnitude of the standard deviations.) O Spends more than 15 minutes on a computer per day O Spends 15-30 minutes on a computer per day Spends more than 30 minutes on a computer per day uppose you predict words per minute the child can type for a member of each of the four populations sampled by the two researchers. Assuming the stimates of the population standard deviations are accurate, your prediction is most likely to be closest to the true value for a fifth grade student ho:

3. Variability and inferential statistics wo researchers, Dr. Kim and Dr. William, are studying the relationship between how many minutes per day a child spends on a computer and how hany words per minute the child can type. Each researcher compares two samples of 50 fifth grade students. One sample spends less time on a omputer, the other spends more time. The following table shows the mean and standard deviations of words per minute the child can type, as they night be shown in a journal article. Researcher: Dr. Kim Researcher: Dr. William Sample A Spends less than 15 minutes on a computer per day (M = 22.16, SD = 10.06) Spends 15-30 minutes on a computer per day (M = 24.66, SD = 8.79) Sample B Spends more than 15 minutes on a computer per day (M= 28.34, SD = 11.12) Spends more than 30 minutes on a computer per day (M = 30.84, SD = 9.15) he summary data from study demonstrates a stronger relationship between how many minutes per day a child spends on a omputer and how many words per minute the child can type. (Hint: Consider the magnitude of the standard deviations.) O Spends more than 15 minutes on a computer per day O Spends 15-30 minutes on a computer per day Spends more than 30 minutes on a computer per day uppose you predict words per minute the child can type for a member of each of the four populations sampled by the two researchers. Assuming the stimates of the population standard deviations are accurate, your prediction is most likely to be closest to the true value for a fifth grade student ho:

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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13. Variability and inferential statistics Two researchers, Dr. Kim and Dr. William, are studying the relationship between how many minutes per day a child spends on a computer and how many words per minute the child can type. Each researcher compares two samples of 50 fifth grade students. One sample spends less time on a computer, the other spends more time. The following table shows the mean and standard deviations of words per minute the child can type, as they might be shown in a journal article. Researcher: Dr. Kim who: Researcher: Dr. William Sample A Spends less than 15 minutes on a computer per day (M = 22.16, SD = 10.06) Spends 15-30 minutes on a computer per day (M = 24.66, SD = 8.79) Sample B Spends more than 15 minutes on a computer per day (M = 28.34, SD = 11.12) The summary data from study demonstrates a stronger relationship between how many minutes per day a child spends on a computer and how many words per minute the child can type. (Hint: Consider the magnitude of the standard deviations.) Spends more than 30 minutes on a computer per day (M = 30.84, SD = 9.15) Suppose you predict words per minute the child can type for a member of each of the four populations sampled by the two researchers. Assuming the estimates of the population standard deviations are accurate, your prediction is most likely to be closest to the true value for a fifth grade student O Spends more than 15 minutes on a computer per day Spends 15-30 minutes on a computer per day O Spends more than 30 minutes on a computer per day O Spends less than 15 minutes on a computer per day
Transcribed Image Text:13. Variability and inferential statistics Two researchers, Dr. Kim and Dr. William, are studying the relationship between how many minutes per day a child spends on a computer and how many words per minute the child can type. Each researcher compares two samples of 50 fifth grade students. One sample spends less time on a computer, the other spends more time. The following table shows the mean and standard deviations of words per minute the child can type, as they might be shown in a journal article. Researcher: Dr. Kim who: Researcher: Dr. William Sample A Spends less than 15 minutes on a computer per day (M = 22.16, SD = 10.06) Spends 15-30 minutes on a computer per day (M = 24.66, SD = 8.79) Sample B Spends more than 15 minutes on a computer per day (M = 28.34, SD = 11.12) The summary data from study demonstrates a stronger relationship between how many minutes per day a child spends on a computer and how many words per minute the child can type. (Hint: Consider the magnitude of the standard deviations.) Spends more than 30 minutes on a computer per day (M = 30.84, SD = 9.15) Suppose you predict words per minute the child can type for a member of each of the four populations sampled by the two researchers. Assuming the estimates of the population standard deviations are accurate, your prediction is most likely to be closest to the true value for a fifth grade student O Spends more than 15 minutes on a computer per day Spends 15-30 minutes on a computer per day O Spends more than 30 minutes on a computer per day O Spends less than 15 minutes on a computer per day
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