SOLUTION: For the following data, approximate the mean number of unused vacation days at the end of the year. Days..... frequency 1-3....... 5 4-6...... 15 7-9..

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Question 1104744: For the following data, approximate the mean number of unused vacation days at the end of the year.
Days..... frequency
1-3....... 5
4-6...... 15
7-9...... 25
10-12...... 12
13-15...... 11

Answer by Boreal(15235)   (Show Source): You can put this solution on YOUR website!
Take the center of each interval and multiply by the frequency.
This become
2*5=10
5*15=75
8*25=200
11*12=132
14*11=154
This adds to 571
divide by n=68
mean is 8.40

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