For a New Product, You Need to Determine the Average

question 19

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