1) The daily closing price of Tesco stock over the past month would be a time series. ⊚ true
⊚ false
Justify your
2) Ahmad randomly samples 120 colleagues asking them about their favorite places to visit.
The data collected would be referred to as cross-sectional data.
⊚ true
⊚ false
Justify your
3) A problem with convenience sampling is that the target population is not well-defined.
⊚ true
⊚ false
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Justify your
4) The closing price of a stock is an example of ratio data.
⊚ true
⊚ false
Justify your
5) Your weight recorded at your annual physical would not be ratio data, because you
cannot have zero weight.
⊚ true
⊚ false
Justify your
6) Temperature measured in degrees Fahrenheit is an example of interval data.
⊚ true
⊚ false
Justify your
7) It is better to attempt a census of a large population instead of relying on a sample.
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⊚ true
⊚ false
Justify your
MULTIPLE CHOICE - Choose the one alternative that best completes the statement or
answers the question. Give justifications for your choice – a maximum of three statements.
8) An investment firm rates bonds for Aard Co Inc. as "B+," while bonds of Deva Corp. are
rated "AA." Which level of measurement would be appropriate for such data?
A) Nominal
B) Ordinal
C) Interval
D) Ratio
Justify your
9) Quantitative variables use which two levels of measurement?
A) Ordinal and ratio
B) Interval and ordinal
C) Nominal and ordinal
D) Interval and ratio
Justify your
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10) Before deciding whether to assess heavy fines against noisy airlines, which sampling
method would the Federal Aviation Administration probably use to measure the peak noise
from departing jets as measured by a ground-level observer at a point one mile from the end of
the departure runway?
A) Radio survey of pilots.
B) Simple random sample.
C) Judgment sample.
D) Stratified sample.
Justify your
11) A population has groups that have a small amount of variation within them, but large
variation among or between the groups themselves. The proper sampling technique is
A) simple random.
B) stratified.
C) cluster.
D) judgment.
Justify your
12) The Centers for Disease Control and Prevention (CDC) wants to estimate the average
extra hospital stay that occurs when heart surgery patients experience postoperative atrial
fibrillation. They divide the United States into nine regions. In each region, hospitals are selected
at random within each hospital size group (small, medium, large). In each hospital, heart surgery
patients are sampled according to known percentages by age group (under 50, 50 to 64, 65 and
over) and gender (male, female). This procedure combines which sampling methods?