7. A new drug study was conducted by a drug company. In the study, 10 people were chosen at random to take Vitamin X for 3 months and then have their cholesterol levels checked. In addition, 10 different people were randomly chosen to take Vitamin Y for 3 months and then have their cholesterol levels checked. All 20 people had cholesterol levels between 8 and 10 before taking one of the vitamins. The drug company wanted to see which of the 2 vitamins had the greatest impact on lowering people's cholesterol. The following data was collected: Vitamin X 7.2 Vitamin Y 7.5 5.2 6.5 7.7 10 6.4 7.6 7.7 7.8 4.8 4.4 4.5 5.1 6.5 8.0 3.1 4.6 5.2 6.1 (a) Draw a box-and-whisker plot for both sets of data on the same number line. (b) Use the double box-and-whisker plots to compare the 2 vitamins and provide a conclusion for the drug company. (c) State the skewness of both distributions and justify your answer.

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7. A new drug study was conducted by a drug company. In the study, 10 people were
chosen at random to take Vitamin X for 3 months and then have their cholesterol levels
checked. In addition, 10 different people were randomly chosen to take Vitamin Y for
3 months and then have their cholesterol levels checked. All 20 people had cholesterol
levels between 8 and 10 before taking one of the vitamins. The drug company wanted
to see which of the 2 vitamins had the greatest impact on lowering people's cholesterol.
The following data was collected:
Vitamin X 7.2
Vitamin Y
7.5
5.2
6.5
7.7
10
7.7 7.8
5.2 6.1
6.4
7.6
4.8
4.4
4.5
5.1
6.5
8.0
3.1
4.6
(a) Draw a box-and-whisker plot for both sets of data on the same number line.
(b) Use the double box-and-whisker plots to compare the 2 vitamins and provide a
conclusion for the drug company.
(c) State the skewness of both distributions and justify your answer.
Transcribed Image Text:7. A new drug study was conducted by a drug company. In the study, 10 people were chosen at random to take Vitamin X for 3 months and then have their cholesterol levels checked. In addition, 10 different people were randomly chosen to take Vitamin Y for 3 months and then have their cholesterol levels checked. All 20 people had cholesterol levels between 8 and 10 before taking one of the vitamins. The drug company wanted to see which of the 2 vitamins had the greatest impact on lowering people's cholesterol. The following data was collected: Vitamin X 7.2 Vitamin Y 7.5 5.2 6.5 7.7 10 7.7 7.8 5.2 6.1 6.4 7.6 4.8 4.4 4.5 5.1 6.5 8.0 3.1 4.6 (a) Draw a box-and-whisker plot for both sets of data on the same number line. (b) Use the double box-and-whisker plots to compare the 2 vitamins and provide a conclusion for the drug company. (c) State the skewness of both distributions and justify your answer.
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