MD 2 Mult Choice Flashcards
1
Q
- Suppose Limitedbrands wanted to know whether installing a more “natural” looking fluorescent lighting system in Express stores would increase sales. If they were to randomly select half the stores to get the new lighting and half in which to keep the old lighting system, and then compare sales in the two groups after a three-month period, what type of statistical study would they be performing?
(a) A designed experiment.
(b) An observational study.
(c) Neither (a) nor (b).
A
A) A designed Experiment
2
Q
- According to their fiscal year 2001 annual report, the average annual sales per square foot of all The Limited stores’ “selling space”-space devoted to selling merchandise-was $260. An analyst taking an SRS of 18 stores found that average 2001 sales per square foot of selling space was $217. Which statement below is correct?
(a) Both $260 and $217 are statistics.
(b) The amount $260 is a parameter, while $217 is a statistic.
(c) The amount $260 is a statistic, while $217 is a parameter.
A
B) 260- Parameter
217- Statistic
3
Q
- A television station is interested in predicting whether voters in its listening area are in favor of federal funding for abortions. It asks its viewers to phone in and indicate whether they are in favor or opposed to this. Of the 2241 viewers who phoned in, 1574 (70.24%) were opposed to federal funding for abortions. The sample obtained is
(a) a simple random sample.
(b) a stratified random sample.
(c) a voluntary response sample.
(d) a convenience sample.
A
C) Voluntary Response
4
Q
- A stratified random sample corresponds to which of the following experimental designs?
(a) a randomized comparative experiment.
(b) a replicated comparative experiment.
(c) a randomized replicated experiment.
(d) a randomized block design.
A
D) Randomized Block Design
5
Q
- Which of the following is not a major principle of experimental design?
(a) comparative experiment.
(b) replication.
(c) randomization.
(d) block design.
A
D) Block Design
