According to the Consumer Expenditure Survey, Americans spend an average of on cellular phone service annually (U.S. Bureau of Labor Statistics website). Suppose that we wish to determine if there are differences in cellular phone expenditures by age group. Therefore, samples of consumers were selected for three age groups ( , , and older). The annual expenditure for each person in the sample is provided in the table below.
Click on the datafile logo to reference the data.
a. Compute the mean, variance, and standard deviation for each of these three samples. Round your answers to one decimal place.
b. What observations can be made based on these data?
The age group that spends the least amount on cellular phone service is
and the age group that spends the biggest amount on cellular phone service is
Click on the datafile logo to reference the data.
a. Compute the mean, variance, and standard deviation for each of these three samples. Round your answers to one decimal place.
b. What observations can be made based on these data?
The age group that spends the least amount on cellular phone service is
and the age group that spends the biggest amount on cellular phone service is
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