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

question 48

Multiple Choice

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.

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