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18.22 Food counseling According to the Centers for Disease Control and Prevention (CDC), obesity rates among U.S. children have increased dramatically over the past three decades, from a low of about 5% to 18% as of 2010. A study examined the effect of family-based food-counseling sessions provided by trained professionals. The study randomly assigned obese children aged 9 to 12 years to either the counseling intervention or a control group not receiving any food counseling. The children's weight changes (in pounds, Ib) after 15 weeks are displayed in Table 18.3 for both conditions. 18 (a) Plot both data sets using dotplots or histograms. Because the sample sizes are quite large, the t procedures folkous or mild

18.22 Food counseling According to the Centers for Disease Control and Prevention (CDC), obesity rates among U.S. children have increased dramatically over the past three decades, from a low of about 5% to 18% as of 2010. A study examined the effect of family-based food-counseling sessions provided by trained professionals. The study randomly assigned obese children aged 9 to 12 years to either the counseling intervention or a control group not receiving any food counseling. The children's weight changes (in pounds, Ib) after 15 weeks are displayed in Table 18.3 for both conditions. 18 (a) Plot both data sets using dotplots or histograms. Because the sample sizes are quite large, the t procedures folkous or mild

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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18.22 please 

COMPARING TWO MEANS 124 126 116 127 119 97 102 110 120 103 115 111 107 100 107 115 111 97 112 104 106 113 109 113 128 128 118 113 124 127 136 106 123 466 CHAPTER EIGHTEEN (a) Treat these data as SRSS from the population of adult long-tailed finches in the wild. Make dotplots of both data sets and determine whether the use of a two-sample t procedure is appropriate. test scores of 31 seventh-grade girls in a midwestern sch district:19 114 100 104 89 102 91 114 114 103 105 72 (b) How much longer, on average, are the central tail feathers of male long-tailed finches than those of the females? Give a 95% confidence interval for the difference in population mean length between the male and the female adult long-tailed finches. 108 130 120 132 111 128 118 119 86 111 103 74 112 107 103 98 96 112 112 0. The IQ test scores of 47 seventh-grade boys in the same 18.22 Food counseling for obese children. According to the Centers for Disease Control and Prevention (CDC), obesity rates among U.S. children have increased dramatically over the past three decades, from a low of about 5% to 18% as of 2010. A study examined the effect of family-based food-counseling sessions provided by trained professionals. The study randomly assigned obese children aged 9 to 12 years to either the counseling intervention or a control group not receiving any food counseling. The children's weight changes (in pounds, lb) after 15 weeks are displayed in Table 18.3 for both conditions. 18 district are as follows: 93 123 79 119 110 110 107 105 105 110 77 90 114 106 (a) Plot both data sets using dotplots or histograms. Because the sample sizes are quite large, the t procedures will work well even in the presence of skew or mild outliers. (a) Make dotplots or histograms of both sets of data. Because the distributions are reasonably symmetric with no extreme outliers, the t procedures will work well. (b) Is there good evidence that obese children receiving food counseling gain less weight over a 15-week period? State the hypotheses, carry out the corresponding test, and conclude in context. (b) Treat these data as SRSS from all seventh-grade students in the district. Is there good evidence that girls and boys differ in their mean IQ scores? > TABLE 18.3 Weight change (Ib) of obese children, by group Intervention -16.7 -14.8 -11.9 -9.7 -9.6 -8.8 -8.0 -7.1 -6.6 -6.0 -5.6 -5.6 -5.5 -5.5 -5.1 -5.0 -5.0 -4.8 -4.4 -4.4 -4.1 -4.0 -4.0 -3.6 -3.5 -3.2 -2.8 -2.0 -1.8 -1.8 -1.4 -1.2 -0.2 -0.1 0.0 0.2 0.6 1.0 1.2 1.2 1.4 1.8 2.0 2.2 2.5 2.8 3.3 4.2 5.4 5.8 6.0 6.4 8.4 Control 12.0 10.0 9.0 8.6 7.1 6.7 6.1 4.8 4.6 4.5 2.8 2.8 2.8 2.7 1.8 1.6 1.0 0.7 0.4 0.1 0.1 -5.1 -5.1
Transcribed Image Text:COMPARING TWO MEANS 124 126 116 127 119 97 102 110 120 103 115 111 107 100 107 115 111 97 112 104 106 113 109 113 128 128 118 113 124 127 136 106 123 466 CHAPTER EIGHTEEN (a) Treat these data as SRSS from the population of adult long-tailed finches in the wild. Make dotplots of both data sets and determine whether the use of a two-sample t procedure is appropriate. test scores of 31 seventh-grade girls in a midwestern sch district:19 114 100 104 89 102 91 114 114 103 105 72 (b) How much longer, on average, are the central tail feathers of male long-tailed finches than those of the females? Give a 95% confidence interval for the difference in population mean length between the male and the female adult long-tailed finches. 108 130 120 132 111 128 118 119 86 111 103 74 112 107 103 98 96 112 112 0. The IQ test scores of 47 seventh-grade boys in the same 18.22 Food counseling for obese children. According to the Centers for Disease Control and Prevention (CDC), obesity rates among U.S. children have increased dramatically over the past three decades, from a low of about 5% to 18% as of 2010. A study examined the effect of family-based food-counseling sessions provided by trained professionals. The study randomly assigned obese children aged 9 to 12 years to either the counseling intervention or a control group not receiving any food counseling. The children's weight changes (in pounds, lb) after 15 weeks are displayed in Table 18.3 for both conditions. 18 district are as follows: 93 123 79 119 110 110 107 105 105 110 77 90 114 106 (a) Plot both data sets using dotplots or histograms. Because the sample sizes are quite large, the t procedures will work well even in the presence of skew or mild outliers. (a) Make dotplots or histograms of both sets of data. Because the distributions are reasonably symmetric with no extreme outliers, the t procedures will work well. (b) Is there good evidence that obese children receiving food counseling gain less weight over a 15-week period? State the hypotheses, carry out the corresponding test, and conclude in context. (b) Treat these data as SRSS from all seventh-grade students in the district. Is there good evidence that girls and boys differ in their mean IQ scores? > TABLE 18.3 Weight change (Ib) of obese children, by group Intervention -16.7 -14.8 -11.9 -9.7 -9.6 -8.8 -8.0 -7.1 -6.6 -6.0 -5.6 -5.6 -5.5 -5.5 -5.1 -5.0 -5.0 -4.8 -4.4 -4.4 -4.1 -4.0 -4.0 -3.6 -3.5 -3.2 -2.8 -2.0 -1.8 -1.8 -1.4 -1.2 -0.2 -0.1 0.0 0.2 0.6 1.0 1.2 1.2 1.4 1.8 2.0 2.2 2.5 2.8 3.3 4.2 5.4 5.8 6.0 6.4 8.4 Control 12.0 10.0 9.0 8.6 7.1 6.7 6.1 4.8 4.6 4.5 2.8 2.8 2.8 2.7 1.8 1.6 1.0 0.7 0.4 0.1 0.1 -5.1 -5.1
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