1. A survey by the Electricity Company of Ghana (ECG) contains questions on the following:

i. Age of household head.

ii. Sex of household head.

iii. Number of people in the household.

iv. Use of electric heating appliances (yes or no).

v. Number of large appliances used daily.

vi. Thermostat setting in the bathroom water heater.

vii. an Average number of hours heating is on.

viii. Average number of heating days.

ix. Household income.

x. Average monthly electric bill.

xi. Ranking of this electric company as compared with two previous electricity suppliers.

Describe the variables implicit in these 11 items as quantitative or qualitative and describe the scales of measurement.

 

2. A district in the Ashanti region town has 102 towns and villages. If you interviewed everyone living in one village, would you be interviewing a population or a sample from the village?

 

3. You are being consulted by a level 400 psychology student on her final project. Her work entails estimating the proportion of students in University of Ghana who are claustrophobic i.e. having an extreme or irrational fear of confined places. 

 

a) What is the population in her case?

b) Would you advise a complete enumeration of the population or a survey? Give reasons.

c) Describe a sampling method you think will help her obtain the best estimate of the proportion of claustrophobic students in population. Justify the selected sampling method and enumerate its advantages over at least one other sampling methodyou know.

4. Define the following terms and give example each:

i. Population

ii. Sample

iii. Survey

iv. Census

v. Parameter

vi. Statistic