Two faculty members ranked 12 candidates for scholarships. Calculate the Spearman rank-correlation coefficient and test it for significance. Use a .02 level of significance.
|
Candidate |
Rank by Professor A |
Rank by Professor B |
|
1 |
6 |
5 |
|
2 |
10 |
11 |
|
3 |
2 |
6 |
|
4 |
1 |
3 |
|
5 |
5 |
4 |
|
6 |
11 |
12 |
|
7 |
4 |
2 |
|
8 |
3 |
1 |
|
9 |
7 |
7 |
|
10 |
12 |
10 |
|
11 |
9 |
8 |
|
12 |
8 |
9 |
———————————————————–
Independent random samples of ten day students and ten evening students at a university showed the following age distributions.
|
Day |
Evening |
|
26 |
32 |
|
18 |
24 |
|
25 |
23 |
|
27 |
30 |
|
19 |
40 |
|
30 |
41 |
|
34 |
42 |
|
21 |
39 |
|
33 |
45 |
|
31 |
35 |
Use a = 0.05 and test for any significant differences in the age distribution of the two populations. Use Wilcoxon Signed-Rank Test.
————————————————————————-
A production process that is in control has a mean (m) of 80 and a standard deviation (s) of 10.
a. Determine the upper and the lower control limits for sample sizes of 25.
b. Five samples had means of 81, 84, 75, 83, and 79. Construct an X bar chart and explain whether or not the process is in control.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more