Reconsider the investigation of the manufacturing process that is producing hypodermic needles. Recall that the most recent random sample of 35 needles have an average diameter of 1.64 mm and a standard deviation of 0.07 mm.
a. Use the Theory-Based Inference applet to find and report a 98% confidence interval and interpret this interval in the context of the study.
b. Explain why you cannot use a simulation-based 2SD method to find a 98% confidence interval for the average diameter of needles produced by this manufacturing process.