Age 75 and over

Age 15 to 19

The Bureau of Labor StatisticsAmerican Time Use Surveyshowed that the amount of time spent using a computer for leisure varied greatly by age. Individuals age 75 and over averaged 0.20 hour (12 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend 0.8 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 10 minutes per day using a computer for leisure.(Round your answers to 4 decimal places.)

Age 75 and over

Age 15 to 19

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

Age 75 and over

Age 15 to 19

c.	Between 20 minutes and 60 minutes using a computer for leisure.(Round your answers to 4 decimal places.)

Age 75 and over

Age 15 to 19

d.	Find the 25th percentile. seventy five percent spend more than what amount of time?(Round your answers to 2 decimal places.)

Amount of time for individuals ages 75 and over	minutes
Amount of time for individuals ages 15 to 19	minutes