Increased blood vessel formulation is a predictive factor in survival for a certain disease. One treatment is stem cell transplantation with the? patient's own stem cells. The accompanying data table represents the microvessel density for patients who had a complete response to the stem cell transplant. The measurements were taken immediately prior to the stem cell transplant and at the time the complete response was determined. Complete parts? (a) through? (d) below.

At the

0.10 level of? significance, is there evidence that the mean microvessel density is higher before the stem cell transplant than after the stem cell?transplant?Let ?1 be the mean density before the transplant and let

?2 be the mean density after the transplant. State the null and alternative hypotheses. Choose the correct answer below.

\fO A. Ho: HD >0 (where HD = My - 12) O B. Ho: HD 20 (where HD = Hy - H2) Hy : HD SO Hy : HD 0 The test statistic is tSTAT = 1.57 . (Round to two decimal places as needed.) The p-value is 0.08 . (Round to three decimal places as needed.) Since the p-value is less than the value of a, reject Ho. There is sufficient evidence to conclude that the mean microvessel density is higher before the stem cell transplant than after the stem cell transplant.O. merp meaning O A. The p-value is the probability of obtaining a sample mean difference of less than or equal to the sample mean difference from the data if the population mean densities both before and after the transplant are different. B. The p-value is the probability of obtaining a sample mean difference of greater than or equal to the sample mean difference from the data if the population mean densities both before and after the transplant are the same. O C. The p-value is the probability of not rejecting the null hypothesis when it is false. O D. The p-value is the probability of rejecting the null hypothesis when it is true. c. Construct and interpret a 90% confidence interval estimate of the mean difference in microvessel density before and after the stem cell transplant. SHD S (Round to one decimal place as needed.)