NSG 621 Module 11 CW problem 1
1. For the following problem, state the most likely hypothesis and compute a
Spearman correlation coefficient. Use an a-Level of 0.05 (two-tailed). Per-
form the computations for the problem both by hand and using statistical
software.
0 Problem: An HMO administrator wants to examine the relationship
of self-rated health to the number of physician visits made in 1 year.
The self-rated health is rated on a scale of 1 to 5, where 1 = poor
health and 5 = excellent health; the number of physician visits made
in the past year is shown in the table below:
Patlmt ID Sell-Rated Heath No. of Phyelclan Vlelte In
the Past Year
1 5 2
2 4 l
3 4 2
4 S 3
S 4 3
6 3 4
7 3 4
8 4 4
9 2 5
10 2 5
11 3 5
12 l 4
a) State the null and alternative hypotheses.
b) Using o = 0.05 (two-tailed) obtain the critical value for r.
c) Check to make sure that the data meet all of the necessary assump-
tions (include scatter plot).
d) Perform the computations necessary to obtain a Spearman rank cor-
relation coefficient.
9) Determine statistical significance and clearly state a conclusion.
f) Upload your statistical software results and provide a concise sum-
mary of the various output measures and conclusions of the test.
