Aresearcher at a major hospital wishes to estimate the proportion of the adult population of the united states that has high blood pressure. how large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 6%? 267 10 755 378

option d)378

Step-by-step explanation:

Given that a researcher at a major hospital wishes to estimate the proportion of the adult population of the United States that has high blood pressure.

Margin of error should be at most 6% = 0.06

Let us assume p =0.5 as when p =0.5 we get maximum std deviation so this method will give the minimum value for n the sample size easily.

We have std error =

For 98%confident interval Z critical score = 2.33

Hence we have margin of error =

Hence answer is option d)378