BUEC 232 Fall 2012
Data and Decisions I Lorene Linklater
Lecture 2 – Measures of Central Tendency
For each of the following examples indicate whether or not the attribute is a numerical or
Entity Attribute Type of Variable
Can of Coke Amount of Coke in the
Households Number of computers
People’s ideas Favourite type of music
SFU students Amount of money spent
on coffee each day
For each of the following variables answer the following questions.
Is it continuous or discrete?
Does it have a minimum value? If yes, what is the minimum value?
Does it have a maximum value? If yes, what is the maximum value?
Discrete or Minimum Maximum
Variable Continuous Value Value
W = the number of customers
arriving at a check-in counter per
X = the number of times a coin is
tossed until the first head
Y = the amount of rain that falls in
Vancouver in a month
Z = the amount of money spent on
groceries per week
For each of the following, determine whether the group is a sample or a population.
(a) The participants in a study of new diabetes drug.
(b) The drivers who received a speeding ticket last month on Highway 1 between the Port
Mann Bridge and the Second Narrows Bridge.
(c) The final marks in BUEC 232 for all the students last semester.
In order to keep costs down, a company wishes to examine the amount of money its sales force
spends entertaining clients. The following is a random sample of eight entertainment expenses
(dinner costs for 4 people) from expense reports submitted by members of the sales force.
$258 $232 $209 $245 $225 $239 $442 $268