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*2.13 Compute the mean change in cholesterol. *2.14 Compute the standard deviation of the change in cholesterol levels. 2.15 Construct a stem-and-leaf plot of the cholesterol changes.

*2.13 Compute the mean change in cholesterol. *2.14 Compute the standard deviation of the change in cholesterol levels. 2.15 Construct a stem-and-leaf plot of the cholesterol changes.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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Please only answer 2.18.
Cardiovascular Disease The data in Table 2.15 are a sample of cholesterol levels. taken from 24 hospital employees who were on a standard American diet and who agreed to adopt a vegetarian diet for 1 month. Serum-cholesterol measurements were made before adopting the diet and 1 month after. The data are Il available at cholesterol.xls at www.cengagebrain.com. *2.13 Compute the mean change in cholesterol. *2.14 Compute the standard deviation of the change in cholesterol levels. 2.15 Construct a stem-and-leaf plot of the cholesterol changes. *2.16 Compute the median change in cholesterol. 2.17 Construct a box plot of the cholesterol changes to the right of the stem-and-leaf plot. 2.18 Some investigators believe that the effects of diet on cholesterol are more evident in people with high rather than low cholesterol levels. If you split the data in Table 2.15 according to whether baseline cholesterol is above or below the median, can you comment descriptively on this issue?
Transcribed Image Text:Cardiovascular Disease The data in Table 2.15 are a sample of cholesterol levels. taken from 24 hospital employees who were on a standard American diet and who agreed to adopt a vegetarian diet for 1 month. Serum-cholesterol measurements were made before adopting the diet and 1 month after. The data are Il available at cholesterol.xls at www.cengagebrain.com. *2.13 Compute the mean change in cholesterol. *2.14 Compute the standard deviation of the change in cholesterol levels. 2.15 Construct a stem-and-leaf plot of the cholesterol changes. *2.16 Compute the median change in cholesterol. 2.17 Construct a box plot of the cholesterol changes to the right of the stem-and-leaf plot. 2.18 Some investigators believe that the effects of diet on cholesterol are more evident in people with high rather than low cholesterol levels. If you split the data in Table 2.15 according to whether baseline cholesterol is above or below the median, can you comment descriptively on this issue?
TABLE 2.15 Serum-cholesterol Subject 1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 10. and after adopting a vegetarian diet Before 195 145 205 159 244 166 250 236 192 224 238 197 169 158 151 197 180 222 168 168 167 161 178 137 After 146 155 178 146 208 147 202 215 184 208 206 169 182 127 149 levels (mg/dL) before 178 161 187 176 145 154 153 137 125 Difference 49 -10 27 13 36 48 21 8 16 32 28 -13 2 19 35 -8 23 HET 13 8 41 12
Transcribed Image Text:TABLE 2.15 Serum-cholesterol Subject 1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 10. and after adopting a vegetarian diet Before 195 145 205 159 244 166 250 236 192 224 238 197 169 158 151 197 180 222 168 168 167 161 178 137 After 146 155 178 146 208 147 202 215 184 208 206 169 182 127 149 levels (mg/dL) before 178 161 187 176 145 154 153 137 125 Difference 49 -10 27 13 36 48 21 8 16 32 28 -13 2 19 35 -8 23 HET 13 8 41 12
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