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Exercise 13. Independence. A researcher is interested in determining if there is a relationship between exercise...

Exercise 13. Independence. A researcher is interested in determining if there is a relationship between exercise and blood pressure for adults over 50. A random sample of 590 adults over 50 is selected and the results are given below. Test the claim that walking and blood pressure are dependent. Use α = 0.05.

Exercise Blood Pressure

Low. Moderate High

Walkers 88   155 62

Non-walkers 53 162 70

Math   Statistics-And-Probability   
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Answer #2

let us consider

H0 :  there is no relationship between exercise and blood pressure for adults over 50

H1 :  there is a relationship between exercise and blood pressure for adults over 50

actual values (O)

Low. Moderate High

Walkers 88   155 62

Non-walkers 53 162 70

Expected Values:(E)

  Low . Moderate High
walkers 72.8898 163.873 68.2373
non walkers 68.1102 153.127 63.7627

Chi-Squared Values:

  Low . Moderate High
walkers 3.13236 0.480421 0.570125
non walkers 3.35217 0.514135 0.610133

Chi-Square = 8.65935

Degrees of Freedom = 2

p = 0.0131718

since p value is less than 0.05 so we reject the null hypothesis and conclude that   there is a relationship between exercise and blood pressure for adults over 50

answered by: anonymous
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