# Compute the Sample Mean and Sample Variance for a Disbursement rate Data

Question

Eighteen measurements of the disbursement rate (in cm3/sec) of a chemical disbursement system are recorded and sorted:

6.50 6.77 6.91 7.38 7.64 7.74 7.90 7.91 8.21

8.26 8.30 8.31 8.42 8.53 8.55 9.04 9.33 9.36

a) Compute the sample mean and sample variance

b) Find the sample upper and lower quartiles.

c) Find the sample median.

d) Construct a box plot of the data.

e) Find the 5th and 95th percentiles of the inside diameter.

Summary: This question belongs to mathematics and discusses about sample mean and sample variance for given data.

Total Word count: 164

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