According to the 2016 Consumer Expenditure Survey, Americans spend an average of $1,124 on cellular phone service annually.† Suppose that we wish to determine if there are differences in cellular phone expenditures by age group. Therefore, samples of 10 consumers were selected for three age groups (18–34, 35–44, 45 and older). The annual expenditure for each person in the sample is provided in the table below. 18–34 35–44 45 and Older 1,355 969 1,135 115 434 956 1,456 1,792 400 2,045 1,500 1,374 1,621 1,277 1,244 994 1,056 825 1,937 1,922 763 1,200 1,350 1,192 1,567 1,586 1,305 1,390 1,415 1,510
According to the 2016 Consumer Expenditure Survey, Americans spend an average of $1,124 on cellular phone service annually.† Suppose that we wish to determine if there are differences in cellular phone expenditures by age group. Therefore, samples of 10 consumers were selected for three age groups (18–34, 35–44, 45 and older). The annual expenditure for each person in the sample is provided in the table below. 18–34 35–44 45 and Older 1,355 969 1,135 115 434 956 1,456 1,792 400 2,045 1,500 1,374 1,621 1,277 1,244 994 1,056 825 1,937 1,922 763 1,200 1,350 1,192 1,567 1,586 1,305 1,390 1,415 1,510
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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According to the 2016 Consumer Expenditure Survey, Americans spend an average of $1,124 on cellular phone service annually.† Suppose that we wish to determine if there are differences in cellular phone expenditures by age group. Therefore, samples of 10 consumers were selected for three age groups (18–34, 35–44, 45 and older). The annual expenditure for each person in the sample is provided in the table below.
18–34 | 35–44 | 45 and Older |
---|---|---|
1,355 | 969 | 1,135 |
115 | 434 | 956 |
1,456 | 1,792 | 400 |
2,045 | 1,500 | 1,374 |
1,621 | 1,277 | 1,244 |
994 | 1,056 | 825 |
1,937 | 1,922 | 763 |
1,200 | 1,350 | 1,192 |
1,567 | 1,586 | 1,305 |
1,390 | 1,415 | 1,510 |
(a)
Compute the mean, variance, and standard deviation for each of the three samples. (Round your answers to two decimal places.)
18–34 | 35–44 | 45+ | |
---|---|---|---|
mean | $ | $ | $ |
variance | |||
standard deviation | $ | $ | $ |
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