Question

Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).

Answer 1

Answer:

The point estimate of the mean of the sample is  32.3 , and the point proportion of the defective units is  0.05 .

Explanation:

Answer 2

Answer: The mean of the samples is 32.325.

Proportion of the defective unit is =$\frac{2}{40}=\frac{1}{20}=0.05$

Explanation:

The point estimate of the mean of the sample:

First calculate the mean of the 40 samples:

$\frac{\text{Sum of all the samples}}{\text{Number of observations}}$

$\frac{1,293}{40}=32.325$

The mean of the samples is 32.325.

Defected pieces in the samples whose life span is less than the 26 days = 2

Proportion of the defective unit is =$\frac{2}{40}=\frac{1}{20}=0.05$