Suppose that vehicles arrive at a fast food drive-through at a
rate of 20 cars per hour. A random sample of 40 one hour time
periods is taken between 12:00 noon and 1:00 pm and it is
found that the average number of cars arriving per hour is
22.1.
a.
Why is the sampling distribution of x bar
approximately normal ?
dovrintion of the

In the study of probability theory, the central limit theorem (CLT) states that the distribution of sample means approximates a normal distribution. The average is a result of common characteristic within the group. As a general rule, sample sizes equal to or greater than 30 are deemed sufficient for the CLT to hold, anything less - ie; daily d=20 x 1ph may mean less cars ) it becomes a general rule, where sample sizes equal to or greater than 30 are deemed sufficient for the CLT to hold

Step-by-step explanation:

c

step-by-step explanation: