a. Explanation Given info: To study the psychological profile a total of 210 children are classified into control group, RAP and Headache with the given data, n Sample Mean Sample Variance Control group 70 11.7 21.6 RAP 70 9.0 13.0 Headache 70 12.4 8.4 Justification: Sample Standard deviation: The standard deviation is the square root of sample variance. The sample standard deviation for each group is given below: The standard deviation for “Control group” is 21 b. To determine The proper sampling method for the given study. To explain: The reason. c. To determine Whether there is any significant difference in mean CBCL scores between the control group and the RAP group. d. To determine To define: Whether it is necessary to check the normality assumption to answer part (c). To explain: The reason. e. To determine Whether the mean scores are different for the three different groups f. To determine To explain: Is it possible to determine whether there is any significant difference between the mean scores of the RAP group and the Headache group based on the results of part (c) and (e).

Fundamentals of Statistics (5th Edition)

5th Edition

ISBN: 9780134508306

Author: Michael Sullivan III

Publisher: PEARSON

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Question

Chapter B.6, Problem 27AYU

To determine

To compute: The sample standard deviation for each group.

To determine

The proper sampling method for the given study.

To explain: The reason.

To determine

Whether there is any significant difference in mean CBCL scores between the control group and the RAP group.

To determine

To define: Whether it is necessary to check the normality assumption to answer part (c).

To explain: The reason.

To determine

Whether the mean scores are different for the three different groups

To determine

To explain: Is it possible to determine whether there is any significant difference between the mean scores of the RAP group and the Headache group based on the results of part (c) and (e).

Expert Solution & Answer

Chapter B.6 Solutions

Fundamentals of Statistics (5th Edition)

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Similar questions

Urban Travel Times Population of cities and driving times are related, as shown in the accompanying table, which shows the 1960 population N, in thousands, for several cities, together with the average time T, in minutes, sent by residents driving to work. City Population N Driving time T Los Angeles 6489 16.8 Pittsburgh 1804 12.6 Washington 1808 14.3 Hutchinson 38 6.1 Nashville 347 10.8 Tallahassee 48 7.3 An analysis of these data, along with data from 17 other cities in the United States and Canada, led to a power model of average driving time as a function of population. a Construct a power model of driving time in minutes as a function of population measured in thousands b Is average driving time in Pittsburgh more or less than would be expected from its population? c If you wish to move to a smaller city to reduce your average driving time to work by 25, how much smaller should the city be?

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The sample standard deviation for each group.

Solution Summary: The author explains that stratified sampling is a procedure where individuals are separated into several non-overlapping groups, such as control group, RAP, and Headache.

To compute: The sample standard deviation for each group.

The proper sampling method for the given study. To explain: The reason.

Whether there is any significant difference in mean CBCL scores between the control group and the RAP group.

To define: Whether it is necessary to check the normality assumption to answer part (c). To explain: The reason.

Whether the mean scores are different for the three different groups

To explain: Is it possible to determine whether there is any significant difference between the mean scores of the RAP group and the Headache group based on the results of part (c) and (e).

Chapter B.6 Solutions

The proper sampling method for the given study.

To explain: The reason.

To define: Whether it is necessary to check the normality assumption to answer part (c).

To explain: The reason.