CONT. .
Week 6
Part 1 of 1 - 40.0 Points
Question 1 of 20
2.0 Points
How are inferential statistics different from descriptive statistics?
A.Descriptive statistics allow drawing inferences from the sample to a target population.
B.Descriptive statistics verify the accuracy of the inferential statistics.
C.Inferential statistics describe the results of a study.
Correct D.Inferential statistics allow drawing inferences from the sample to a target population.
Answer Key: D
Question 2 of 20
2.0 Points
_____ are characteristics of samples, while _____ are characteristics of populations.
A.Concepts; statistics
B.Parameteres; statistics
Correct C.Statistics; parameters
D.Parameters; estimations
Answer Key: C
Question 3 of 20
2.0 Points
In a normal distribution, what percentage of scores falls between one standard deviation below
the mean and one standard deviation above the mean?
, A.16%
B.50%
Correct C.68%
D.90%
Answer Key: C
Question 4 of 20
2.0 Points
Here is a set of scores: 5, 3, 7, 3, 6, 2, 5, 3. The median of this set of scores is ______.
A.2
B.3
Correct C.4
D.4.5
Answer Key: C
Question 5 of 20
2.0 Points
Here is a set of scores: 5, 3, 7, 3, 6, 2, 5, 3. Those mode of this set of scores is _____.
A.3
B.4
Incorrect C.4.22
D.4.5
Answer Key: A
Question 6 of 20
2.0 Points
An exam was given to two sections of the same course. In Section 1, the exam mean was 51
and the standard deviation was 7. In Section 2, the exam mean was 51 and the standard
deviation was 13. Which of the following conclusions is accurate?
A.Section 1 did better on the exam than Section 2.
B.Section 1 scores were more variable than Section 2.
Correct C.Section 1 scores were less variable than Section 2.
, D.Section 1 did less well on the exam than Section 2.
Answer Key: C
Question 7 of 20
2.0 Points
The z score, or standard score, allows the researcher to determine:
Correct A.how far a target individual's score is from the group mean.
B.what percentage of individuals in the sample scored above the target individual.
C.the mean for the population based on the mean for the sample.
D.what percentage of individuals in the sample scored below the target individual
Answer Key: A
Question 8 of 20
2.0 Points
Danzell is a purchasing agent for a major grocery store chain. He has noticed over the years
that the higher the outdoor temperature, the more likely people are to buy fresh fruit. Based on
Danzell's observations, we would say there is ____________ relationship between outdoor
temperature and buying of fresh fruit.
Correct A.a positive
B.a negative
C.a causal
D.no
Answer Key: A
Question 9 of 20
2.0 Points
Frank Fitness found a correlation coefficient of -.74 between hours of strenuous exercise each
week and a standard measure of body mass. He interprets this to mean that there is a ______
and ______ relationship between hours of strenuous exercise and body mass.
A.strong; positive
Correct B.strong; negative
C.weak; positive
, D.weak; negative
Answer Key: B
Question 10 of 20
2.0 Points
Statistical hypothesis testing involves the:
A.research hypothesis.
B.probability level.
C.significance level.
Correct D.null hypothesis.
Answer Key: D
Question 11 of 20
2.0 Points
A placebo is given to the___________:
A.experimental group
B.treatment group
Correct C.control group
D.both groups
Answer Key: C
Question 12 of 20
2.0 Points
We are intersted in the relationship between music and mood. We have a group of participants,
we measure their mood, then, we have them listen to 20 minutes of sad country music, then, we
measure their mood again. We have just conducted a (n)_____________:
Incorrect A.static group comparison
B.pretest-posttest control group design
C.one-group pretest -postttest design
D.within subjects design
Answer Key: C
Week 6
Part 1 of 1 - 40.0 Points
Question 1 of 20
2.0 Points
How are inferential statistics different from descriptive statistics?
A.Descriptive statistics allow drawing inferences from the sample to a target population.
B.Descriptive statistics verify the accuracy of the inferential statistics.
C.Inferential statistics describe the results of a study.
Correct D.Inferential statistics allow drawing inferences from the sample to a target population.
Answer Key: D
Question 2 of 20
2.0 Points
_____ are characteristics of samples, while _____ are characteristics of populations.
A.Concepts; statistics
B.Parameteres; statistics
Correct C.Statistics; parameters
D.Parameters; estimations
Answer Key: C
Question 3 of 20
2.0 Points
In a normal distribution, what percentage of scores falls between one standard deviation below
the mean and one standard deviation above the mean?
, A.16%
B.50%
Correct C.68%
D.90%
Answer Key: C
Question 4 of 20
2.0 Points
Here is a set of scores: 5, 3, 7, 3, 6, 2, 5, 3. The median of this set of scores is ______.
A.2
B.3
Correct C.4
D.4.5
Answer Key: C
Question 5 of 20
2.0 Points
Here is a set of scores: 5, 3, 7, 3, 6, 2, 5, 3. Those mode of this set of scores is _____.
A.3
B.4
Incorrect C.4.22
D.4.5
Answer Key: A
Question 6 of 20
2.0 Points
An exam was given to two sections of the same course. In Section 1, the exam mean was 51
and the standard deviation was 7. In Section 2, the exam mean was 51 and the standard
deviation was 13. Which of the following conclusions is accurate?
A.Section 1 did better on the exam than Section 2.
B.Section 1 scores were more variable than Section 2.
Correct C.Section 1 scores were less variable than Section 2.
, D.Section 1 did less well on the exam than Section 2.
Answer Key: C
Question 7 of 20
2.0 Points
The z score, or standard score, allows the researcher to determine:
Correct A.how far a target individual's score is from the group mean.
B.what percentage of individuals in the sample scored above the target individual.
C.the mean for the population based on the mean for the sample.
D.what percentage of individuals in the sample scored below the target individual
Answer Key: A
Question 8 of 20
2.0 Points
Danzell is a purchasing agent for a major grocery store chain. He has noticed over the years
that the higher the outdoor temperature, the more likely people are to buy fresh fruit. Based on
Danzell's observations, we would say there is ____________ relationship between outdoor
temperature and buying of fresh fruit.
Correct A.a positive
B.a negative
C.a causal
D.no
Answer Key: A
Question 9 of 20
2.0 Points
Frank Fitness found a correlation coefficient of -.74 between hours of strenuous exercise each
week and a standard measure of body mass. He interprets this to mean that there is a ______
and ______ relationship between hours of strenuous exercise and body mass.
A.strong; positive
Correct B.strong; negative
C.weak; positive
, D.weak; negative
Answer Key: B
Question 10 of 20
2.0 Points
Statistical hypothesis testing involves the:
A.research hypothesis.
B.probability level.
C.significance level.
Correct D.null hypothesis.
Answer Key: D
Question 11 of 20
2.0 Points
A placebo is given to the___________:
A.experimental group
B.treatment group
Correct C.control group
D.both groups
Answer Key: C
Question 12 of 20
2.0 Points
We are intersted in the relationship between music and mood. We have a group of participants,
we measure their mood, then, we have them listen to 20 minutes of sad country music, then, we
measure their mood again. We have just conducted a (n)_____________:
Incorrect A.static group comparison
B.pretest-posttest control group design
C.one-group pretest -postttest design
D.within subjects design
Answer Key: C
