Blood pressure:High blood pressure has been identified as a risk factor for heart attacks and strokes. The proportion of U.S. adults with high blood pressure is0.3

. A sample of31

U.S. adults is chosen. Use the TI-84 Plus Calculator as needed. Round the answer to at least four decimal places.

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Part 1 of 5

Is it appropriate to use the normal approximation to find the probability that more than

47

%

of the people in the sample have high blood pressure?It

is not

appropriate to use the normal curve, since=

np

9.3

<

10

and=

n

1

p

21.7

10

.

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Part 2 of 5

A new sample of83

adults is drawn. Find the probability that more than41

%

of the people in this sample have high blood pressure.The probability that more than41

%

of the people in this sample have high blood pressure is

.