Statistical tests. Match up the following studies with the most appropriate stat
ID: 3178318 • Letter: S
Question
Statistical tests. Match up the following studies with the most appropriate statistical test.
* Are three sample means different from one another? H0: 1 = 2 = 3.
* Compare the mean rolling velocity of 2500 leukocytes at a low fluid shear rate,
with the mean rolling velocity of 3000 leukocytes at a high fluid shear rate.
* Compare the red blood cell counts of 20 patients before and after treatment with
erythropoietin.
* When do fibroblasts stop spreading on fibronectin? Compare the average area of
12 cells at t=30min with the average area of 10 cells at t=120 min.
* Mortality rates of different groups of leukemic mice are presented in a 4×2
contingency table. Test for differences among the populations.
(A) Two-sample z test.
(B) Paired t test.
(C) Two-sample t test. (D) 2 test.
(E) Analysis of variance.
Explanation / Answer
1) Are three sample means different from one another? H0: 1 = 2 = 3. (E) Analysis of variance.
Compare the mean rolling velocity of 2500 leukocytes at a low fluid shear rate,
2)with the mean rolling velocity of 3000 leukocytes at a high fluid shear rate. (A) Two-sample z test.
3)* Compare the red blood cell counts of 20 patients before and after treatment with
erythropoietin. (B) Paired t test.
4)
* When do fibroblasts stop spreading on fibronectin? Compare the average area of
12 cells at t=30min with the average area of 10 cells at t=120 min.(C) Two-sample t test.
5)* Mortality rates of different groups of leukemic mice are presented in a 4×2
contingency table. Test for differences among the populations. D) 2 test.