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# Time Measurement and Histogram Construction

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1. A psychologist is studying the length of time it takes mice to go through a maze and reach a reward at the end. Time is measured to the nearest tenth of a second with the results given in the table below.

Time Frequency
2.0 up to 3.0 3
3.0 up to 4.0 7
4.0 up to 5.0 15
5.0 up to 6.0 29
6.0 up to 7.0 81
7.0 up to 8.0 50
8.0 up to 9.0 10
9.0 up to 10.0 5

A. Construct a histogram for the data.

2. Mr. and Mrs. Jones live in a neighborhood where the mean family income is \$45,000 with a standard deviation of \$9,000. Mr. and Mrs. Paul live in a neighborhood where the mean is \$100,000 and the standard deviation is \$30,000. What are the relative dispersions of the family incomes in the two neighborhoods?

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#### Solution Preview

1. A psychologist is studying the length of time it takes mice to go through a maze and reach a reward at the end. Time is measured to the nearest tenth of a second with the results given in the table below.

A. Construct a histogram for the data.

First, find the midpoint of each interval by finding the average of the left endpoint and the right endpoint of the interval. The midpoints are ...

#### Solution Summary

The solution examines a time measurement and histogram construction for length of time taken for mice to go through a maze.

\$2.49