From a random sample of size 200 drawn from a local community, 120 respondents identify themselves as Democrats. For the community as a whole, 75% of the residents classify themselves as Democrats. In this research situation
A) Ps is .60 and Pu is .50
B) Pu is .75 and Ps is .60
C) Pu is .75 and Ps is 120
D) the t test is called for

Question

Quizplus · Accepted Answer

Pu is the population proportion of Democrats, which is given in the problem as 75%. Ps is the sample proportion of Democrats, which is calculated from the sample as 120/200 = 0.6. Therefore, Choice B is the correct answer.

From a Random Sample of Size 200 Drawn from a Local