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

See similar textbooks

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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)

Ch. B.6 - The acronym ANOVA stands for __________ __...Ch. B.6 - True or False: To perform a one-way ANOVA, the...Ch. B.6 - True or False: To perform a one-way ANOVA, the...Ch. B.6 - The variability among the sample means is called...Ch. B.6 - The variability within each treatment group, which...Ch. B.6 - True or False: The F-test statistic is F0=MSTMSE.Ch. B.6 - In Problems 7 and 8, fill in the ANOVA table. 7.Ch. B.6 - In Problems 7 and 8, fill in the ANOVA table. 8.Ch. B.6 - In Problems 9 and 10, determine the F-test...Ch. B.6 - In Problems 9 and 10, determine the F-test...

Ch. B.6 - NW 11. The following data represent a simple...Ch. B.6 - The following data represent a simple random...Ch. B.6 - NW 13. Corn Production The data in the table...Ch. B.6 - Soybean Yield The data in the table represent the...Ch. B.6 - Which Delivery Method Is Best? At a community...Ch. B.6 - Births by Day of Week An obstetrician knew that...Ch. B.6 - Rates of Return A stock analyst wondered whether...Ch. B.6 - Reaction Time In an online psychology experiment...Ch. B.6 - Car-Buying Discrimination To determine if there is...Ch. B.6 - Crash Data The Insurance Institute for Highway...Ch. B.6 - Lower Your Cholesterol Researcher Francisco...Ch. B.6 - pH in Rain An environmentalist wanted to determine...Ch. B.6 - Age and Politics Do peoples political philosophy...Ch. B.6 - Concrete Strength An engineer wants to know if the...Ch. B.6 - Analyzing Journal Article Results Researchers...Ch. B.6 - Prob. 27AYU Ch. B.6 - Diversity and pH The following data represent the...Ch. B.6 - Another E-Cig Study In a study of adult smokers...Ch. B.6 - What are the requirements to perform a one-way...Ch. B.6 - What is the mean square due to treatment estimate...Ch. B.6 - Why does a large value of the F statistic provide...Ch. B.6 - In a one-way ANOVA, explain what it means to...

Knowledge Booster

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.