The Bureau of Labor Statistics’ American Time Use Survey showed that the amount

Question

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 0.35 hour (21 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend 1.2 hour per day using a computer for leisure. If these times follow an exponential distribution, find the proportion of each group that spends:

rev: 05_18_2015_QC_CS-14973

Less than 20 minutes per day using a computer for leisure. (Round your answers to 4 decimal places.)

Between 40 minutes and 120 minutes using a computer for leisure. (Round your answers to 4 decimal places.)

Find the 26th percentile. seventy four percent spend more than what amount of time? (Round your answers to 2 decimal places.)

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 0.35 hour (21 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend 1.2 hour per day using a computer for leisure. If these times follow an exponential distribution, find the proportion of each group that spends:

Explanation / Answer

POISSON 1.2 hr = 72 min a) 75 P(x120 ) = 0 c) P( 40 x 120) = P(x 120) - P( x 40) =1-0.999927=0.00007

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