Suppose you need to estimate a difference in mean systolic blood pressures between men and women. You've constructed a 95% confidence interval for this test and obtained the lower limit of −25.07 and the upper limit of 6.47. What conclusion can you make?
A) There is no statistically significant difference in mean systolic blood pressures between men and women.
B) We have sufficient evidence to conclude that there is a difference in mean systolic blood pressures between men and women.
C) There is statistically significant difference in mean systolic blood pressures between men and women.
D) The test was not conducted correctly.

Question

Suppose you need to estimate a difference in mean systolic blood pressures between men and women. You've constructed a 95% confidence interval for this test and obtained the lower limit of −25.07 and the upper limit of 6.47. What conclusion can you make? ​
A) There is no statistically significant difference in mean systolic blood pressures between men and women.
B) We have sufficient evidence to conclude that there is a difference in mean systolic blood pressures between men and women.
C) There is statistically significant difference in mean systolic blood pressures between men and women.
D) The test was not conducted correctly.

Quizplus · Accepted Answer

Since the 95% confidence interval for the difference in mean systolic blood pressures between men and women includes zero (ranging from −25.07 to 6.47), we cannot conclude there is a statistically significant difference between the groups.

Suppose You Need to Estimate a Difference in Mean Systolic