If "np is greater than or equal to 15" and "n(1-p) is greater than or equal to 15", what is the approximate shape of the sampling distribution of the sample proportion?

The sampling distribution of the sample proportion will be approximately normally distributed with mean and standard deviation

Step-by-step explanation:

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

If np >= 15 and n(1-p) >= 15

Can be approximated to the normal distribution, with mean and standard deviation

So

The sampling distribution of the sample proportion will be approximately normally distributed with mean and standard deviation

rick would give her the best deal as he will charge $8.88 per hour