The distribution for purchase amounts is normal with mean = $36 and standard deviation = $8.
Find the probability that the mean purchase amount for 16 customers exceeds $40.
standard_error <- 8 - sqrt(16)
1 - pnorm(40, 36, standard_error)
The distribution for purchase amounts is normal with mean = $36 and standard deviation = $8.
Find the probability that the mean purchase amount for 16 customers exceeds $40.
standard_error <- 8 - sqrt(16)
1 - pnorm(40, 36, standard_error)