Local food distributor claims that 18% of all food sold are vegetables. If 112 food items are sold are randomly selected, what is the probability that the proportion of vegetables sold differs from the population proportion by more than 2%?
I am trying to plug in the formula for standard score for a sample proportion, but I'm not getting anything that makes sense. I tried by hand and with my ti-84 but I'm not sure how to put it in the calf correctly. I like to use the calc to check my work even when I do it by hand.
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