2
WEEK 2 TUTORIAL EXERCISES (To be discussed in week starting March 5)
1.
What is meant by a variable in a statistical sense? Distinguish between qualitative and
quantitative statistical variables, and between continuous and discrete variables.
Give
examples.
2.
Distinguish between (a) a statistical population and a sample; (b) a parameter and a
statistic. Give examples.
3.
In order to know the market better, the second-hand car dealership, Anzac Garage,
wants to analyze the age of second-hand cars being sold. A sample of 20
advertisements for passenger cars is selected from the second-hand car
advertising/listing website
www.drive.com.au
The ages of the vehicles at time of
advertisement are listed below:
5, 5, 6, 14, 6, 2, 6, 4, 5, 9, 4, 10, 11, 2, 3, 7, 6, 6, 24, 11
(a)
Calculate frequency, cumulative frequency and relative frequency distributions
for the age data using the following bin classes:
More than 0 to less than or equal to 8 years
More than 8 to less than or equal to 16 years
More than 16 to less than or equal to 24 years.