The hematocrits of 8 cardiac patients were obtained in a res

The hematocrits of 8 cardiac patients were obtained in a research studyThe data were as follows (The units are \"percent\".)

39.2 36.4 38.3 36.8 42.9 37.0 39.1 41.2

The Professor of Cardiac Medicine asserts you that the population mean hematocrit for cardiac patients is 40.5%. Should you believe her?
(a) Write down the null and alternative hypotheses in mathematical symbols.
(b) Write down the test statistic and give its observed value.

(c) Find the table value (critical value) and write down rejection region for =0.05.
(d) Carry out the one sample t test using Minitab.
(e) What are you assuming about the data by employing one sample t test. Verify your assumption using probability plot.
(f) Give your decision about the test at each of the three \"standard\" significance levels of 0.10, 0.05, and 0.01.
(g) Give your conclusion in the context of research.

Solution