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Time Measurement and Histogram Construction

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?

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.

$2.19