For a New Product, You Need to Determine the Average

Multiple Choice

For a new product, you need to determine the average diameter of a specialized electronic component, which will be a critical component of the new product.You measure the diameter in a sample of size 15 and find an average diameter of 0.24 mm, with a standard deviation of 0.02 mm.Other studies indicate that the diameter of similar products is normally distributed.The 99% confidence interval for the average diameter of this electronic component is closest to ______.

A) 0.232 to 0.248
B) 0.230 to 0.250
C) 0.228 to 0.252
D) 0.225 to 0.255
E) 0.224 to 0.256