Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are recorded in the table below. Do you think that their cholesterol levels were significantly lowered? Conduct a hypothesis test at the 5% level. Starting cholesterol level Ending cholesterol level 170 170 220 230 110 120 240 220 200 190 180 150 190 200 360 300 280 300 260 240

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
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Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are
recorded in the table below. Do you think that their cholesterol levels were significantly
lowered? Conduct a hypothesis test at the 5% level.
Starting cholesterol level
Ending cholesterol level
170
170
220
230
110
120
240
220
200
190
180
150
190
200
360
300
280
300
260
240
i.
State the distribution to use for the test. (Enter your answer in the form z or ta where df is
the degrees of freedom.)
What is the test statistic? (If using the z distribution round your answer to two decimal
places, and if using the t distribution round your answer to three decimal places.)
iil.
ii.
What is the p-value? (Round your answer to four decimal places.)
Transcribed Image Text:Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are recorded in the table below. Do you think that their cholesterol levels were significantly lowered? Conduct a hypothesis test at the 5% level. Starting cholesterol level Ending cholesterol level 170 170 220 230 110 120 240 220 200 190 180 150 190 200 360 300 280 300 260 240 i. State the distribution to use for the test. (Enter your answer in the form z or ta where df is the degrees of freedom.) What is the test statistic? (If using the z distribution round your answer to two decimal places, and if using the t distribution round your answer to three decimal places.) iil. ii. What is the p-value? (Round your answer to four decimal places.)
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