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

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation:

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632