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 mo behavioral problems than the average kindergarten child? Use a one-tailed test with a = .01. b. Compute the 90% confidence interval for the mea rating of behavioral problems for the population o kindergarten children who have a history of chi

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Chapter1: Starting With Matlab
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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 u = 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.
Transcribed Image Text: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 u = 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.
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