Assume that the following confidence interval for the difference in the mean length of male (sample 1) and female babies (sample 2) at birth was constructed using independent simple random samples. $- 0.2 \mathrm { in }

Question

Assume that the following confidence interval for the difference in the mean length of male (sample 1) and female babies (sample 2) at birth was constructed using independent simple random samples. $- 0.2 \mathrm { in } < \mu _ { 1 } - \mu _ { 2 } < 2.7 \mathrm { in }$. What does the confidence interval suggest about the difference in length between male babies and female babies?
A) Male babies are longer.
B) Female babies are longer.
C) There is no difference in the length between male and female babies.

Quizplus · Accepted Answer

The confidence interval includes 0, which suggests that there is no statistically significant difference in the mean length between male and female babies.

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