no.4 only When a production process is operating correctly, the number of units produced per hour has a normal distribution with a mean of12 A random sample of 9 hours was taken. Complete parts (a) through (d).a. Find the mean of the sampling distribution of the sample meansE(X) - 103 (Type an integer or a decimal)b. Find the variance of the sample mean.o16 (Type an integer or a decimal.)c. Find the standard error of the sample mean.-4 (Type an integer ar a decimel)d. What is the probability that the sample mean exceeds 104.67P(X> 104.6) - (Round to four decimal places as needed.)

The given distribution follow normal distribution with n =9 sample size with the help of sample mean…

Answered: d What is the probability that the…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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d What is the probability that the sample mean exceeds 104.67 P(X> 104.6) - (Round to four decimal places as needed.)