A medical researcher is interested in determining if there is a relationship between adults over 50 who walk regularly and low, moderate, and high blood pressure. A random sample of 236 adults over 50 is selected and the results are given below. Test the claim that walking and low, moderate, and high blood pressure are independent. Use a = 0.01.

Blood Pressure Low Moderate High

Walkers 35 62 25

Non-walkers 21 65 28

Since p > 0.01 we accept H0 that walking and low, moderate, and high blood pressure are independent. at a = 0.01.

Step-by-step explanation:

Given that a medical researcher is interested in determining if there is a relationship between adults over 50 who walk regularly and low, moderate, and high blood pressure.

A random sample of 236 adults over 50 is selected and the results are given below.

We have to test chi square test of independence between levels of blood pressure and walking exercise

H0: There is no difference between means of walkers and non walkers

Ha: There is difference

(Two tailed chi square test at 1% level of significance)

Chi square contingency table

BP Low Moderate High

Walkers 35 62 25 122

Non walkers 21 65 28 114

56 127 53 236

Expected

Walkers 28.94915254 65.65254237 27.39830508 122

Non walkers 27.05084746 61.34745763 25.60169492 114

56 127 53 236

Chi square 0.176093321

df 2

p value 0.915718148

Since p > 0.01 we accept H0 that walking and low, moderate, and high blood pressure are independent. at a = 0.01.