Consider as the mean of a random sample of 60 elements drawn from a population with mean of 115 with a standard deviation of 39 Please calculate in excel showing steps
Calculate the following elements:
a)	Mean and Standard Deviation of
b)	Find the probability that assumes a value between 112 and 117
c)	Find the probability that assumes a value greater than 116
Hint: Remember that for sample over 30 according to the Central Limit Theorem the sample is approximately normally distributed (Z)
Hint: To calculate the std. Deviation we are considering infinite population