Question one
A group of 8 accountancy students are tested in Quantitative Techniques and Management Accountancy. Their rankings in the two tests were:
Student Q.T. M.A
Ranking Ranking
A 2 3
B 7 6
C 6 4
D 1 2
E 4 5
F 3 1
G 5 8
H 8 7
Work out the spearman rank correlation .
Question two
|
X
|
Y
|
|
15
|
60
|
|
24
|
45
|
|
25
|
50
|
|
30
|
35
|
|
35
|
42
|
|
40
|
46
|
|
45
|
28
|
|
65
|
20
|
|
70
|
22
|
|
75
|
15
|
|
|
363
|
Given the above data, find the pearson correlation coefficient.
Question three
A study by consumer Exports showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name brands. To investigate whether this results applies to its own product, the manufacturer of a national name brand Ketch up asked a sample of shoppers whether they believe that super markets Ketchup was as good as the national brand Ketchup.
a. Formulate the hypotheses that could be used to determine whether the percentage of supermarket shoppers who believe that the supermarket Ketchup was as good as the national brand Ketchup differed from 64%.
b. If a sample of 100 shoppers showed 52 stating that the supermarket brand was as good as the national brand what is the P-value?
c. At α = 0.05, what is your conclusion?
d. Should the national brand Ketchup manufacturer be pleased with this conclusion? Explain.