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Statistics / Statistical Techniques in Business and Economics 15 / Chapter 7 / Problem 39

Statistical Techniques in Business and Economics | 15th Edition | ISBN: 9780073401805 | Authors: Douglas Lind, William Marchal, Samuel Wathen

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

Chapter 0, Problem 39

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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 0.3 hour (18 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend 1.0 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 15 minutes per day using a computer for leisure. b. More than two hours. c. Between 30 minutes and 90 minutes using a computer for leisure. d. Find the 20th percentile. Eighty percent spend more than what amount of time?

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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 0.3 hour (18 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend 1.0 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 15 minutes per day using a computer for leisure. b. More than two hours. c. Between 30 minutes and 90 minutes using a computer for leisure. d. Find the 20th percentile. Eighty percent spend more than what amount of time?

ANSWER:

Step 1 of 5

The mean amount of time spent on computer for leisure by individuals aged 75 years and above is minutes. This implies

The mean amount of time spent on computer for leisure by individuals aged 15 to 19 years is minutes. This implies

Let be the amount of time spent on computer for leisure.

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