Construct and interpret a

99%

confidence interval estimate of the mean difference in microvessel density before and after the stem cell transplant.

negative 94.8 less than or equalsmu Subscript Upper DDless than or equals262.8

Part 7

Interpret this interval. Choose the correct answer below.

A.

With

99%

confidence, the mean difference in microvessel density before and after the stem cell transplant falls in this interval.

B.

With

1%

confidence, the mean difference in microvessel density before and after the stem cell transplant falls in this interval.

C.

With

1%

confidence, the mean microvessel densities before and after the stem cell transplant fall outside this interval.

D.

With

99%

confidence, the mean microvessel densities before and after the stem cell transplant fall in this interval. What assumption is necessary about the population distribution in order to perform the test in (a)? a. At the 0.01 level of significance, is there evidence that the mean microvessel density is higher before the stem cell transplant than after the stem cell transplant? What assumption is necessary about the population distribution in order to perform the test in (a)?

A.

It must be assumed that the distribution of the differences between the measurements is approximately normal.

B.

It must be assumed that the distribution of the differences between the measurements is approximately uniform.

C.

It must be assumed that the distribution of the differences between the measurements is skewed.