The Bureau of Labor Statistics American Time Use Survey show

The Bureau of Labor Statistics’ American Time Use Survey showed that the amount of time spent using a computer for leisure varied greatly by age. Individuals age 75 and over averaged 0.15 hour (9 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend 0.9 hour per day using a computer for leisure. If these times follow an exponential distribution, find the proportion of each group that spends:

a.   Less than 9 minutes per day using a computer for leisure (Round your answers to 4 decimal places.)

Age 75 and over

   Ages 15 to 19

b.            More than two hours (Round your answers to 4 decimal places.)

Age 75 and over

Ages 15 to 19

c. Between 18 minutes and 54 minutes using a computer for leisure. (Round your answers to 4 decimal places.)

  Age 75 and over

Ages 15 to 19

d.   Find the 34th percentile. sixty six percent spend more than what amount of time? (Round your answers to 2 decimal places.)

Amount of time for individuals ages 75 and over              

  Amount of time for individuals ages 15 to 19

Solution