STA1506 ASSIGNMENT 2 SOLUTIONS

, STA1506
ASSIGNMENT 2
Basic Statistical Computing


QUESTION 1
(a) How many random variables are being studied in the questionnaire?

There are a total of 5 variables under section A (Demographics) and 2 variables under section B
(Usage levels). Therefore, the total number of random variables being studied is 5 + 2 = 7.



(b) For each variable being measured in the questionnaire from A1 to A5 and B1 to B2:

(i) Suggest the name of the variable,

(ii) Identify the data type of the random variable,

(iii) Identify the measurement scale of the variable being measured.



Variables under section A (Demographics):

A1:

(i) Name: Age

(ii) Data type: Discrete

(iii) Measurement scale: Ordinal (The categories have a meaningful order, but the intervals between
categories are not necessarily equal.)