A cell phone company believes that 90 percent of its customers are satisfied with their service. They survey n = 30 customers. Based on this, it is acceptable to assume the sample distribution is normally distributed.

Question

Quizplus · Accepted Answer

The sample size of 30 is too small to assume a normal distribution for a proportion, especially when the expected number of successes (np) and failures (n(1-p)) are not both greater than 5.

A Cell Phone Company Believes That 90 Percent of Its