Question

Suppose that 80% of customers who enter a store make a purchase.

For a random sample of 50 customers, how would you describe the proportion (of the 50 customers) who make a purchase? (is it a number, a fraction, a random variable, does it have a mean or standard deviation, is it skewed, etc.)

Answer 1

Here, the random sample of 50 customers is called as Sample population. Let Y be a random variable to count the number of customers who made a purchase is. Because for every random sample of 50 customers, the value of Y differs.Since this is a random variable, it has mean , median , standard deviation e.t.c., The distribution may be skewed because 80 percent of customers make a purchase and this can be reflected in the distribution of the random variable Y.