Mth 302 solved Quizs

1 The number of FedEx shipping centers in each of 20 randomly-chosen cities would be
ordinal scale data.
A) True
B) False

2 A categorical (qualitative) variable has values that are described in words rather than
numbers.
A) True
B) False

3 Temperature (measured in degrees Fahrenheit) is an example of ratio data because it has
a zero.
A) True
B) False

4 If you randomly sample 50 students about their television viewing habits at one point in
time, the data collected would be referred to as time series data.
A) True
B) False

5 Internet surveys posted on popular websites such as MSN.com suffer from selection bias.
A) True
B) False

6 Which statement is correct?
A) Class standing (freshman, sophomore, junior, senior) would be ratio data.
B) Sampling without replacement introduces bias in our estimates.
C) In a random numbe r table, every digit is equally likely to occur.
D) Focus groups usually work best without a trained moderator.

7 Which variable is least likely to be regarded as ratio data?
A) Length of time required for a randomly-chosen vehicle to cross a toll bridge (minutes).
B) Weight of a randomly-chosen casting in a foundry (kilograms).
C) Number of fatalities in a randomly-chosen airline disaster (persons).
D) Supervisor's rating of a randomly-chosen employee's performance (Likert scale).