Given a population mean of 27.1 with a standard deviation of 8.4 and a sample size of 10, answer these questions: Part A: What is the standard deviation of the sampling distribution of x? Show your work

Part B: what does the sample size need to be if you want the standard deviation of the sampling distribution of c to be2.8? Show your work.

Step-by-step explanation:

The mean of the sampling distribution is equal to the mean of the population. Therefore, we use the standard deviation of the sampling distribution of the means formula. 

                  The standard deviation of the sampling distribution of the means is 2.656. 

With a new population standard deviation of 2.8, the sampling size, n, is 9. 

show us the graphs dude

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.