Two researchers, Dr. John and Dr. Lo, are studying the relationship between how

Question

Two researchers, Dr. John and Dr. Lo, 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 5th 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. 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. 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 5th grade student who: Spends more than 15 minutes on a computer per day Spends more than 30 minutes on a computer per day Spends 15-30 minutes on a computer per day Spends less than 15 minutes on a computer per day

Explanation / Answer

(first part) The summary data from Dr. Lo study...............

as standard deviation is less .................

(second part) right choice is third Spends 15-30 minutes on a computer per day

as the standard deviation is least among the four group , it means least variability more accurate of prediction

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.