The amount of time that customers spend shopping on a particular website is normally distributed with = 8 minutes and = 3 minutes. A random sample of...

d)  Suppose that time spent was not normally distributed. Are the probabilities computed in (b) and (c)

still approximately valid? Explain.

1) a) Sample mean follows exactly normal distribution because population is givennormal Mean of sampling means:µx¯ = µ = 8Standard deviation of Sample mean or Standard error:σ3SE = σx¯...