The drug company wanted to see which of the 2 vitamins had the greatest impact on lowering people’s cholesterol.
All 30 people had cholesterol levels between 8 and 10 before taking one of the vitamins. In addition, 15 different people were randomly chosen to take Vitamin Y for 2 months and then have their cholesterol levels checked. In the study, 15 people were chosen at random to take Vitamin X for 2 months and then have their cholesterol levels checked. A new drug study was conducted by a drug company in Medical Town. This would, therefore, mean that the times are more predictable and reliable.Ģ. Since the range for the driving times is smaller, it means the times to arrive by car are less spread out. For the bus times, the range is 32−12=20 minutes. The range for the car times is 17−8=9 minutes. Using the medians, 50% of the cars arrive at school in 11 minutes or less, whereas 50% of the students arrive by bus in 17 minutes or less. When plotted, the box-and-whisker plots look like the following: Use the double box-and-whisker plots to compare the times it takes for students to arrive at school either by car or by bus. Emma and Daniel collected the following data:īus times (min) 14 18 16 22 25 12 32 16 15 18Ĭar times (min) 12 10 13 14 9 17 11 10 8 11ĭraw a box-and-whisker plot for both sets of data on the same number line. There were those who drove their own cars to school, and there were those who took the school bus.
There are 2 main groups of commuters who were in the survey. Emma and Daniel are surveying the times it takes students to arrive at school from home.
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