3) Transverse diameter measurements on the hearts of adult males and females gave the following results.

Group	Sample Size	x bar (cm)	s (cm)
Males	12	13.21	1.05
Females	9	11.00	1.01

a) Name and define the population parameter you are estimating:

b) Construct the 95% confidence interval for this parameter:

What is the point estimate?

What is the reliability factor?

What is the standard error for this sample?

What is the margin of error for the estimate?

State the complete confidence interval.

Interpret your result in words. Are the populations different?

4) A treatment group of 138 women received an enhanced leaflet about cervical cancer screening. A control group of 136 women received the standard leaflet. A week later, all women were asked if they were willing to be screened. In the treatment group, 109 women said yes; in the control group, 120 women said yes.

a) Name and define the population parameter you are estimating:

b) Construct the 95% confidence interval for this parameter:

What is the point estimate?

What is the reliability factor?

What is the standard error for this sample?

What is the margin of error for the estimate?

State the complete confidence interval.

Interpret your result in words. Are the populations different?