Assume that the following confidence interval for the difference in the mean time (in minutes) for male students to complete a statistics test (sample 1) and the mean time for female students to complete a statistics test (sample 2) was constructed using independent simple random samples. -0.2 minutes $< \mu _ { 1 } - \mu _ { 2 } < 2.7 \text { minutes }$
What does the confidence interval suggest about the difference in length between male and female test completion times?

Question

Assume that the following confidence interval for the difference in the mean time (in minutes) for male students to complete a statistics test (sample 1) and the mean time for female students to complete a statistics test (sample 2) was constructed using independent simple random samples.  -0.2  minutes $< \mu _ { 1 } - \mu _ { 2 } < 2.7 \text { minutes }$
What does the confidence interval suggest about the difference in length between male and female test completion times?
A) Male students take longer to complete a statistics test.
B) Female students take longer to complete a statistics test.
C) There is no difference in the length of time for statistics test completion between male and female students.

Quizplus · Accepted Answer

The confidence interval includes 0, which suggests that there is no statistically significant difference in the mean test completion times between male and female students.

Assume That the Following Confidence Interval for the Difference in the Mean