Use the following information for questions:
Data were collected by giving a survey to a random sample of students at a university. One question asked was: "Do you believe in extraterrestrial life?"Here is a comparison of the proportions of males and females that said "yes":

Subscripts in these questions are 1 = females, 2 = males.
-How is the p-value for this test found?
A) The area to the left of -2.64 under the standard normal distribution.
B) The area to the right of -2.64 under the standard normal distribution.
C) The area to the left of -2.64 under a t distribution with 72 degrees of freedom.
D) The area to the right of -2.64 under a t distribution with 72 degrees of freedom.

Question

Use the following information for questions:
Data were collected by giving a survey to a random sample of students at a university. One question asked was: "Do you believe in extraterrestrial life?"Here is a comparison of the proportions of males and females that said "yes": 
  
Subscripts in these questions are 1 = females, 2 = males.
-How is the p-value for this test found?
A) The area to the left of -2.64 under the standard normal distribution. 
B) The area to the right of -2.64 under the standard normal distribution. 
C) The area to the left of -2.64 under a t distribution with 72 degrees of freedom. 
D) The area to the right of -2.64 under a t distribution with 72 degrees of freedom.

Quizplus · Accepted Answer

The p-value is the area to the left of the test statistic under the null hypothesis. In this case, the test statistic is -2.64 and the null hypothesis is that the mean of the population is 0. The p-value is therefore the area to the left of -2.64 under the standard normal distribution.

Use the Following Information for Questions