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Solved: Travel Time to Work The frequency distribution
Chapter 10, Problem 6RE(choose chapter or problem)
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 |
0-9 |
125 |
10-19 |
271 |
20-29 |
186 |
30-39 |
121 |
40-49 |
54 |
50-59 |
62 |
60-69 |
43 |
70-79 |
20 |
80-89 |
13 |
Source: Based on data from the 2009 American Community Survey |
(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.
Questions & Answers
QUESTION:
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 |
0-9 |
125 |
10-19 |
271 |
20-29 |
186 |
30-39 |
121 |
40-49 |
54 |
50-59 |
62 |
60-69 |
43 |
70-79 |
20 |
80-89 |
13 |
Source: Based on data from the 2009 American Community Survey |
(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.
ANSWER:
Step 1 of 3
Given, 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 |
0-9 |
125 |
`10-19 |
271 |
20-29 |
186 |
30-39 |
121 |
40-49 |
54 |
50-59 |
62 |
60-69 |
43 |
70-79 |
20 |
80-89 |
13 |