Question One

aWhat are the steps undertaken in hypothesis testing.

b. What are the three (3) qualities of a good estimator.

cDiscuss any four (4) methods of data collection.

d)Taking year 1 as a base year, compute the index numbers

Year 1 2 3 4

Value 12,380 12,490 12,730 13,145

d. The specimen of copper wires drawn from a large lot have the following breaking strength (ink of strength weight):

572, 578, 572, 570, 568, 572, 578, 570, 596, 544

Test using student t- test whether the mean breaking strength of the lot may be taken to be 578kg weight (Test at 5% level of significance).

Question 2

Question Two

a)State any five (5) uses of regression analysis.

a)State any three (3) qualities of a good estimator.

c)Discuss any four (4) methods of data collection.

d)Obtain the equation of the line of best fit by least squares method for the following date:

Y 0 1 2 3 4 5 6

X 2 1 3 2 4 3 5

f. What are four (4) uses of index numbers.

Question 3

The following table shows the number of items responded to in a questionnaire:

Items 5 - 7 8-10 11-13 14-16 17-19 20-22 23-25

2 4 8 7 5 3 1

Calculate:

(i)The mean

(ii)The median

(iii)The standard deviation

b)Describe the nature of the distribution.

c)Explain any considerations taken when displaying such date.

d)Explain why tabulation of data is necessary in research.