Quantitative Analysis (MANM4103)
Management and Marketing - MGT
Semester: First Semester
Level: 400
Year: 2018
Quantitative Methods (ACCM 4193 & MANM 4103) CA
Duration: One Hour Instruction: Answer AH Questions
Question one
a)
State and explain the two types of statistical error that can be committed when conducting a
statistical test.
b)
Using an example, distinguish between a one and two tailed test showing clearly the rejection
regions on a diagram.
Question two
A brewery distributes beer in bottles labeled 32 cl. The local bureau of weights and measures
randomly selects 49 of these bottles, measures their contents and obtains a sample mean of 30 cl.
Assuming that the variance is 0.64cl. Is it valid at the 5 percent level of significance to conclude that
the brewery is cheating the consumers? (Critical Value = 1.645)
Question three
The marketing manager of an automobile company forecasted the sales for the different brands of cars
as shown in the table below. The observed sales are also shown in the table.
Car Brand
A
B
C
D
E
F
G
Forecasted Sales
20
30
25
15
20
15
10
Observed sales
14
25
30
22
28
20
15
Using a 5% level of significance, is it necessary to change the forecasting plans of the marketing
department? (Critical Value = 12.59)
www.schoolfaqs.net
www.schoolfaqs.net
