A $99 \%$ Confidence Interval (In Inches) for the Mean Height of a Height

A $99 \%$ confidence interval (in inches) for the mean height of a population is $65.7 < \mu < 67.3$ . This result is based on a sample of size 144. Construct the $95 \%$ confidence interval. (Hint: you will first need to find the sample mean and sample standard deviation) .

A) $65.7$ in. $< \mu < 67.3 \mathrm { in }$ .
B) $65.9$ in. $< \mu < 67.1 \mathrm { in }$ .
C) $65.6$ in. $< \mu < 67.4 \mathrm { in }$ .
D) $66.0 \mathrm { in } . < \mu < 67.0 \mathrm { in }$ .