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A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10 cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of significance and test whether there is evidence of reduced cholesterol level. Subject Before After A 196 181 B 224 219 с 201 209 D 196 176 E 176 170 F 259 229 G 265 255 H 193 190 I 240 240 J 268 250

A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10 cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of significance and test whether there is evidence of reduced cholesterol level. Subject Before After A 196 181 B 224 219 с 201 209 D 196 176 E 176 170 F 259 229 G 265 255 H 193 190 I 240 240 J 268 250

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
Section10.4: Distributions Of Data
Problem 19PFA
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a. Is the sampling dependent or independent in this study? Justify your answer. 
b. Use the critical value approach, test whether there is evidence of reduced cholesterol level. Include all key
steps of the test. 

A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10 cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of significance and test whether there is evidence of reduced cholesterol level. Subject Before After A 196 181 B 224 219 с 201 209 D 196 176 E 176 170 F 259 229 G 265 255 H 193 190 I 240 240 J 268 250
Transcribed Image Text:A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10 cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of significance and test whether there is evidence of reduced cholesterol level. Subject Before After A 196 181 B 224 219 с 201 209 D 196 176 E 176 170 F 259 229 G 265 255 H 193 190 I 240 240 J 268 250
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