Question 2

The question was:

A doctor at a walk-in clinic is studying high blood pressure among patients of the ages twenty to forty. According to the American Heart Association, a person has high blood pressure if their Systolic and Diastolic readings are above 139 and 89 respectively. A random sample of 14 patients revealed the following blood pressures, where the readings (x,y) correspond to (Systolic,Diastolic) blood pressures.

(160,109)(190,110)(119,79)(130,85)(140,90)(120,84)(119,70)(119,70)(110,70)(130,89)(110,79)(110,79)(140,90)(159,99)

Assume that the population distribution is normal.

For full marks your answer should be accurate to at least two decimal places.

a)Find the meandiastolicreading of blood pressure for this sample.

Your answer was: 85.93

b)Obtain a point estimate of the population mean ofdiastolicblood pressures.

Your answer was: 85.93

c)Construct a 99-percent confidencediastolicreading estimate for the population mean.

Your answer was: (75.37,96.48)

d)Can we conclude that these patients have a meandiastolicreading in the high blood pressure area?

From our findings we can not conclude that the patients have a high mean blood pressure.

Can someone explain me how to get those answer please, thanks!