A local eat-in pizza restaurant wants to investigate the possibility of starting

Question

A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful if the average time spent on the deliveries does not exceed 38 minutes. The owner has randomly selected 15 customers and has delivered pizzas to their homes. what assumption is necessary for applying the t-test?

a. the population variance must equal the population mean

b. the population of delivery times must have a normal distribution

c. the population of paired differences must be normal

d. none of these assumptions are necessary

Explanation / Answer

since n = 15

we use t test

for any test the population must be normally distributed

option B is right

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