Aprocess capability study is conducted for an injection mold. you are tasked to evaluate if the process will yield a greater than 99% acceptance relative to the critical dimension assigned to you. the part requires 1.45” +/-0.008 and you are given 20 parts that measure an average of 1.45” with a standard deviation of 0.0015. what is the range of the true mean with 99% confidence interval?

1.4494 and 1.4506

Step-by-step explanation:

Given : Sample size : , which is less than 30 so the sample is a small sample.

Sample mean :

Standard deviation :

Significance level :

Critical value :

The confidence interval for population mean is given by :-

Hence, the range of the true mean with 99% confidence interval is between 1.4494 and 1.4506.

5y

step-by-step explanation:

45

step-by-step explanation: