College Students Tested to See If How Well You Know

Multiple Choice

College students tested to see if how well you know a person affects your ability to detect a lie from that person. To do this, they came up with 10 statements about a person in their group. Five of these statements were true and five were False. The group tried to make up statements that no-body (not even close friends) would know if they were true or False. The students then presented these statements to people that fit in three groups: close friends, acquaintances, and complete strangers and counted how many statements each person correctly identified as true or False. A summary of the results are as follows.
-The two graphs, A and B, show dotplots from two different data sets. Suppose I want to com-pare the means in A and do another comparison of means in B. For each case I compute an F-statistic. Which of the following will be true about these statistics?

A) The F-statistic is the same in A and B.
B) The F-statistic is larger in A than in B.
C) The F-statistic is smaller in A than in B.
D) We cannot tell if the F-statistic will be larger in A or B.