Question

ALEKS Greater Than Less Than Calculator Comparing. greater than sign - Google Search Question 10 of 10 (1 point) Attempt 1 of 1 View question in a popup | 46m 45s Remaining 6.3 Section Exercise 2 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 is 0.3. A sample of 33 U.S. adults is chosen. Use the TI-84 Plus Calculator as needed. Round the answer to at least four decimal places. Part 1 of 5 Is it appropriate to use the normal approximation to find the probability that more than 43% of the people in the sample have high blood pressure? It is not appropriate to use the normal curve, since np - 9.9 and n (1 - p) – 23.1 10. Part: 1/5 Part 2 of 5 A new sample of 80 adults is drawn. Find the probability that more than 38% of the people in this sample have high blood pressure. The probability that more than 38% of the people in this sample have high blood pressure is

Answer 1

First part is correct.

Part 2.

Here n=80 and p=0.3

So E(P)= np=80*0.3=24 > 10

nq=80*0.7=56 >10 Both the conditions satisfies so we can use Normal Approximation here.

Standard Deviation = =0.051

p(1 - p)/n

P[More than 38% of the people ] =P(X>0.38)

=P(Z>0.38-0.3/0.051)

=P(Z>1.57)

=1-P(Z<1.57)

=1-0.9418

=0.0582

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