A sample of pvc pipes coming off a production line were test

Reference no: EM13241586

A sample of PVC pipes coming off a production line were tested for pipe diameter size. The statistical results (in millimeters) were:

Mean 300

Median 300

Mode 300

Standard Deviation 15

Range 90

Number in Sample 100

a) According to the Normal Rule, what percent of the pipes had diameters between 285 and 315?

b) What would the range of pipe diameters need to be in order to capture 95% of the pipe diameters?

Reference no: EM13241586

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