Ask Question
23 September, 16:14

A quality inspector took five samples, each with 4 observations, of the length of time for glue to dry. The analyst computed the mean of each sample, and then computed the grand mean of 12.14. Use this information to obtain the three-sigma upper control limit for the means of future times. It is known from previous experience that the standard deviation of the process is 0.05.

+2
Answers (1)
  1. 23 September, 17:17
    0
    12.57

    Explanation:

    The first part is correct with the answer of 12.57. The formula is x_bar_bar + 3*sigma/sqrt (n)

    Here x_bar_bar = 12.51, sigma = 0.04, n = 4.

    Thus UCL = 12.51 + 3*0.04/sqrt (4) = 12.57
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A quality inspector took five samples, each with 4 observations, of the length of time for glue to dry. The analyst computed the mean of ...” in 📙 Business if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers