3c. The population of possible sample means is assumed normally distributed since the underlying sample values were normally distributed. Since this is the case, we can use the Empirical Rule to determine the lower and upper limit (interval) of expected sample means based on samples of size 100. That is, we can use the interval to predict the range of possible values of sample means when the process is working correctly. Use the Empirical Rule to determine the two values between which we expect to see almost all sample means (of size 100) when the process is working. You must write a formula that references the assumed parameters. When we say almost all, we mean 99.7% of data, which is contained between 3 SE of the population mean. Write the formula for the lower limit in cell E19, and for the upper limit in F19.

Assumed Parameters
Mean =	400
Std Dev =	2
Std Err =	0.20
3c
	Lower	Upper
Limits