Agreenhouse in a tri-county area has kept track of its customers for the last several years and has determined that it has about 10,000 regular customers. of those customers, 28% of them plant a vegetable garden in the spring. the greenhouse obtains a random sample of 800 of its customers. is it safe to assume that the sampling distribution of , the sample proportion of customers that plant a vegetable garden, is approximately normal? answer yes or no.