Fifteen adult males between the ages of 35 and 50 participated in a study to evaluate the effect of diet and exercise on blood cholesterol levels. The total cholesterol was measured in each subject initially and then three months after participating in an aerobic exercise program and switching to a low-fat diet. The data are shown in the following table.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter7: Applying Fractions
Section7.5: Percents
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Fifteen adult males between the ages of 35 and 50 participated in a study to evaluate the effect of diet and exercise on blood cholesterol levels. The total cholesterol was measured in each subject initially and then three months after participating in an aerobic exercise program and switching to a low-fat diet. The data are shown in the following table.

1
265
229
240
231
3
258
224
4
295
240
251
238
6
245
241
7
287
234
315
250
256
249
10
279
239
11
283
246
12
240
218
13
238
219
14
225
226
15
247
233
2.
00
Transcribed Image Text:1 265 229 240 231 3 258 224 4 295 240 251 238 6 245 241 7 287 234 315 250 256 249 10 279 239 11 283 246 12 240 218 13 238 219 14 225 226 15 247 233 2. 00
(a) Do the data support the claim that low-fat diet and aerobic exercise are of value in producing a mean
reduction in blood cholesterol levels? Use a = 0.05. Suppose that the hypotheses are Ho: 4z = 0 versus
H1:Ha > 0, where d; = Before; – After;. What is the test statistic?
Round your answer to three decimal places (e.g. 98.765).
to =
i 1.761
(b) Calculate a one-sided confidence limit that can be used to answer the question in part (a).
Round your answer to three decimal places (e.g. 98.765).
i
36.38
Transcribed Image Text:(a) Do the data support the claim that low-fat diet and aerobic exercise are of value in producing a mean reduction in blood cholesterol levels? Use a = 0.05. Suppose that the hypotheses are Ho: 4z = 0 versus H1:Ha > 0, where d; = Before; – After;. What is the test statistic? Round your answer to three decimal places (e.g. 98.765). to = i 1.761 (b) Calculate a one-sided confidence limit that can be used to answer the question in part (a). Round your answer to three decimal places (e.g. 98.765). i 36.38
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