a normally distributed population has mean 57.7 and standard deviation 12.1
a) find the probability that a single randomly selected element x of the population is less than 45
b) find the mean and the standard deviation of x-x for sample size 16
c) find the probability that the mean of sample of size 16 drawn from the population is less than 45
(a). Probability that a single randomly selected element X of the population is less than 45 :
(b).
mean of sampling distribution
standard deviation of sampling distribution
(c). Probability that the mean of a sample of size 16 drawn from this population is less than 45
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