Question

2. Suppose a computer engineer is interested in determining the average weight of a motherboard manufactured by a certain company. A simple random sample of 20 is provided to the engineer with the data given below.

12.25, 10.38, 12.12, 11.04, 12.11, 10.79, 13.30, 11.18, 12.78, 12.25, 11.10, 12.53, 12.56, 11.79, 13.56, 12.64, 11.54, 13.75, 11.47, 13.33

(a) Plot a QQ plot of the data given.

(b) Explain what confidence interval will you use and why.

(c) Construct a 95% confidence interval as described in (b) and interpret the confidence interval.

I understand how to make the QQ plot, so I only need help on B & C.

Answer 1