please choose one :

1)Consider a statistic defined as the distance between 33rd sample percentile and 67th sample percentile. This statistic would give us information concerning

a.

skewness

b.

variability

c.

central tendency

d.

relative position

e.

None of the suggested answers are correct

2)In a cumulative percentage frequency distribution based on n observations, the upper limit of the last class will have a cumulative percentage frequency

a.

equal to the total number of elements in the data set divided by n

b.

none of the suggested answers are correct

c.

equal to 100

d.

between zero and n

e.

equal to n

3)Returns on investments are normally distributed with a mean of 8% and a standard deviation of 3.0%. The percentage of investors that earned at least 5% is

a.

None of the suggested answers are correct

b.

11.00%

c.

84.13%

d.

100%

e.

34.13%

4)Nasee took Exam_A whose mean was 84 with standard deviation 5. She also took Exam_B whose mean was 80 with standard deviation 4. If she scored 92 on both exams, on which exam did she do better compared to the other students who took the exam?

a.

She did the same on both exams, relatively speaking

b.

She did better on the Exam_B, comparatively speaking

c.

Cannot tell without more information

d.

None of the suggested answers are correct

e.

She did better on the Exam_A, comparatively speaking

5)A random variable is normally distributed with a mean of 30 and a standard deviation of 4. If an observation is randomly selected from the distribution, what value will 6.3% of the observations be below?

a.

23.88

b.

29.75

c.

Not enough information given

d.

25.75

e.

None of the suggested answers are correct