Researchers in a certain medical center are interested in assessing the effect of chronic lecithin use on total blood cholesterol. A sample of ten middle-aged men with hypercholesterolemia had their total blood cholesterol measured prior to and following a six month regimen of lecithin intake. The results for total blood cholesterol (CH) level in mg/dl are as follows: Subject 7 6 1 2 3 4 8 10 Pre CH Post CH 242 247 239 245 233 255 267 239 246 247 234 232 256 223 260 255 238 243 235 221 Assume that the data follows the normal distribution. Using the 0.05 level of significance, test whether the population mean blood cholesterol level changed after prolonged lecithin use. Consider the above data as coming from a two independent populations. Test at 5% level of significance whether the means of blood cholesterol level differs in the Pre CH and Post CH.
Researchers in a certain medical center are interested in assessing the effect of chronic lecithin use on total blood cholesterol. A sample of ten middle-aged men with hypercholesterolemia had their total blood cholesterol measured prior to and following a six month regimen of lecithin intake. The results for total blood cholesterol (CH) level in mg/dl are as follows: Subject 7 6 1 2 3 4 8 10 Pre CH Post CH 242 247 239 245 233 255 267 239 246 247 234 232 256 223 260 255 238 243 235 221 Assume that the data follows the normal distribution. Using the 0.05 level of significance, test whether the population mean blood cholesterol level changed after prolonged lecithin use. Consider the above data as coming from a two independent populations. Test at 5% level of significance whether the means of blood cholesterol level differs in the Pre CH and Post CH.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
Related questions
Question
PLEASE ANSWER NUMBER 4 AND 5 ONLY. Use number 3 for data reference. Need the answer ASAP.
Transcribed Image Text:3. Researchers in a certain medical center are interested in assessing the effect of chronic lecithin
use on total blood cholesterol. A sample of ten middle-aged men with hypercholesterolemia had
their total blood cholesterol measured prior to and following a six month regimen of lecithinn
intake. The results for total blood cholesterol (CH) level in mg/dl are as follows:
Subject
7
6
1
2
3
4
8
9
10
245
256
Pre CH
239
233
255
267
239
246
247
242
234
Post CH
232
223
260
255
238
243
235
247
221
Assume that the data follows the normal distribution. Using the 0.05 level of significance, test
whether the population mean blood cholesterol level changed after prolonged lecithin use.
4. Consider the above data as coming from a two independent populations. Test at 5% level of
significance whether the means of blood cholesterol level differs in the Pre CH and Post CH.
5. Are the results in (3) and (4) different? If yes, what do you think is the reason of its difference?
Which of the two tests do think is more appropriate to use? Why? Justify your claim.
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