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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:

70.8, 27.1, 66.2, 20.8
Find the expected frequency E2,2 to test the claim that walking and low, moderate, and high blood pressure are not related.

Respuesta :

obasola1

Answer:

c. 66.2

Step-by-step explanation:

expected frequency=

Eij= row total in the ith row* column total in the jth column/ (Grand total of te frequency

Eij=137*114/(236)

Eij=15502/236

66.2 approximate

               lw     mod  high  

walker 32 68 22 122  

non walker 24 69 21 114  

56 137 43 236 Total

ly

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