If 25 of the 35 females in a research study agree with a statement,and 15 of the 35 males agree with this statement,the expected value for males-agree is:
A)15
B)20
C)25
D)35

Question

Quizplus · Accepted Answer

The expected value for males-agree can be calculated by finding the proportion of males in the sample and multiplying it by the number of males who agree with the statement.

The proportion of males in the sample is (35-25)/70 = 10/70 = 1/7.

So the expected value for males-agree is (1/7) x 15 = 2.14.

However, since we cannot have a fraction of a person, we round the expected value to the nearest whole number, which is 2.

Therefore, the best choice is B (20), which is closest to the expected value of 2.

If 25 of the 35 Females in a Research Study