phoebe surveyed teens and adults to find the average number of hours of sleep they get during the week. her…

phoebe surveyed teens and adults to find the average number of hours of sleep they get during the week. her results are shown below. which statement regarding her survey results is true? hours of sleep for teens 1 2 3 4 5 6 7 8 9 10 11 12 hours of sleep for adults 1 2 3 4 5 6 7 8 9 10 11 12 adults get more hours of sleep on average than teens. adults have less variability in the hours of sleep. teens have less variability in the hours of sleep. teens get less sleep on average than adults.

phoebe surveyed teens and adults to find the average number of hours of sleep they get during the week. her results are shown below. which statement regarding her survey results is true? hours of sleep for teens 1 2 3 4 5 6 7 8 9 10 11 12 hours of sleep for adults 1 2 3 4 5 6 7 8 9 10 11 12 adults get more hours of sleep on average than teens. adults have less variability in the hours of sleep. teens have less variability in the hours of sleep. teens get less sleep on average than adults.

Answer

Explanation:

Step1: Analyze box - and - whisker plots

The box - and - whisker plot for teens has a median around 7 hours and a larger spread (from about 4 to 9 hours). The box - and - whisker plot for adults has a median around 6 hours and a smaller spread (from about 5 to 7 hours).

Step2: Evaluate each statement

  • Adults get more hours of sleep on average than teens: The median for teens (around 7) is greater than the median for adults (around 6), so this is false.
  • Adults have less variability in the hours of sleep: The inter - quartile range (IQR) and the overall spread of the adult box - and - whisker plot is smaller than that of the teens. Variability is measured by spread, so this is true.
  • Teens have less variability in the hours of sleep: The spread of the teens' data is larger, so this is false.
  • Teens get less sleep on average than adults: The median for teens is greater than for adults, so this is false.

Answer:

Adults have less variability in the hours of sleep.