Respuesta :
Answer:
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.
