# Tolerance Interval

In order to control costs. a company wishes to study the amount of money its sales force spends entertaining clients.

The following is a random sample of six entertainment expenses (dinner costs for four people) from expense reports submitted by numbers of the sales force.

Sales force numbers

157

132

109

145

125

139

Calculate Mean, Variance, and Standard Deviation. Assuming that the distribution on entertainment expenses is approximately normally distributed, calculated estimate of tolerances interval containing 95.44%.

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#### Solution Preview

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Calculate Mean, Variance, and Standard Deviation.

In order to control costs, a company wishes to study the amount of money its sales force spends entertaining clients.

The following is a random sample of six entertainment expenses (dinner costs for four people) from expense reports submitted by numbers of the sales force.

Sales force numbers

157

132

109

145

125 ...

#### Solution Summary

The solution provides step by step method for the calculation of mean, variance, standard deviation and tolerance interval. Formula for the calculation and Interpretations of the results are also included.