22. Belsky, Weinraub, Owen, and Kelly (2001) reported on the effects of preschool child care on the devel- opment of young children. One result suggests that children who spend more time away from their moth- ers are more likely to show behavioral problems in kindergarten. Using a standardized scale, the aver- age rating of behavioral problems for kindergarten children is a = 35. A sample of n - 16 kindergarten children who had spent at least 20 hours per week in child care during the previous year produced a mean score of M= 42.7 with a standard deviation of s= 6. a. Are the data sufficient to conclude that children with a history of child care show significantly more behavioral problems than the average kindergarten child? Use a one-tailed test with a = .01. b. Compute the 90% confidence interval for the mean rating of behavioral problems for the population of kindergarten children who have a history of child care. c. Write a sentence showing how the outcome of the hypothesis test and the confidence interval would appear in a research report.

22. Belsky, Weinraub, Owen, and Kelly (2001) reported on the effects of preschool child care on the devel- opment of young children. One result suggests that children who spend more time away from their moth- ers are more likely to show behavioral problems in kindergarten. Using a standardized scale, the aver- age rating of behavioral problems for kindergarten children is a = 35. A sample of n - 16 kindergarten children who had spent at least 20 hours per week in child care during the previous year produced a mean score of M= 42.7 with a standard deviation of s= 6. a. Are the data sufficient to conclude that children with a history of child care show significantly more behavioral problems than the average kindergarten child? Use a one-tailed test with a = .01. b. Compute the 90% confidence interval for the mean rating of behavioral problems for the population of kindergarten children who have a history of child care. c. Write a sentence showing how the outcome of the hypothesis test and the confidence interval would appear in a research report.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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