A student obtained data from 10 males and 16 females on attitudes toward premarital sex. A $\chi$²on the data was not significant so he polled the same 26 people again, combined the two $\chi$²'s and found a significant difference between the sexes. Which of the following alternatives is correct? A) Because $\chi$²is additive the second conclusion is valid. B) The overall $\chi$²is based on events that are not independent so the second conclusion is invalid. C) The number of males and females differed so the second conclusion is questionable. D) A final conclusion can be drawn when the direction of the differences in attitude is known.

Question

Quizplus · Accepted Answer

Polling the same group of people twice and combining the results violates the principle of independent observations, which is crucial for statistical tests to be valid. This means the second conclusion, based on non-independent events, is invalid.

A Student Obtained Data from 10 Males and 16 Females χ\chiχ

A Student Obtained Data from 10 Males and 16 Females $\chi$