Amedical 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.

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  

walker326822122  

non walker246921114  

5613743236Total

ly

step-by-step explanation:

what are the statements? and what do you mean by "216 2 1 6"?

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°