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The frequency distribution listed in the table represents the travel
The frequency distribution listed in the table represents the travel time to work (in minutes) for a random sample of 895 U.S. adults.
Travel Time (minutes) ... Frequency
09 ........... 125
1019 ........... 271
2029 ........... 186
3039 .......... 121
4049 .......... 54
5059 .......... 62
6069 ........... 43
7079 ........... 20
8089 ........... 13
(a) Approximate the mean travel time to work for U.S. adults.
(b) Approximate the standard deviation travel time to work for U.S. adults.
Travel Time (minutes) ... Frequency
09 ........... 125
1019 ........... 271
2029 ........... 186
3039 .......... 121
4049 .......... 54
5059 .......... 62
6069 ........... 43
7079 ........... 20
8089 ........... 13
(a) Approximate the mean travel time to work for U.S. adults.
(b) Approximate the standard deviation travel time to work for U.S. adults.
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