11 Questions
| Total Attempts: 2007

Questions and Answers

- 1.
- A.
A frequency table transforms the raw scores by showing the means.

- B.
Frequency tables display patterns, organizing the data by how often each score occurs.

- C.
Raw scores are not based on the sample.

- D.
Raw scores do not represent the data.

- 2.In comparing frequency tables with grouped frequency tables for the same set of data, which of the following would be true?
- A.
Depending on the width of class intervals it is possible that some scores may not be counted in a grouped frequency table.

- B.
If the data set is large the grouped frequency table would be easier to decipher.

- C.
Because of overlapping class intervals, the total frequency for a grouped frequency table would exceed that of a frequency table.

- D.
It is generally harder to spot patterns in the data when using a grouped frequency table.

- 3.A bar graph is usually used with __________ data while a histogram is used with _________ data.
- A.
Interval; nominal

- B.
Ratio; scale

- C.
Nominal; scale

- D.
Nominal; ordinal

- 4.A normal distribution is:
- A.
Symmetric.

- B.
Bell-shaped, symmetric, and unimodal.

- C.
Unimodal.

- D.
Bell-shaped.

- 5.A distribution containing a few extremely small values is likely to create a distribution that is:
- A.
Negatively skewed.

- B.
Normal.

- C.
Positively skewed.

- D.
Non-representative.

- 6.A frequency distribution that is bell-shaped, symmetric, and unimodal is called a:
- A.
Skewed distribution.

- B.
Sampling distribution.

- C.
Probability distribution.

- D.
Normal distribution.

- 7.Imagine a researcher found that 65% of bystanders helped a female who dropped her packages but only 32% helped a male that dropped his packages. What type of graph would be appropriate to display this data?
- A.
Bar graph

- B.
Frequency polygon

- C.
Not enough information is available to answer the question

- D.
Histogram

- 8.Imagine that you calculated Body Mass Index (BMI) for a group of college students and created the grouped frequency table below:
**BMI****Frequency**40-44.99 1 35-39.99 4 30-34.99 6 25-29.99 10 20-24.99 20 15-19.99 3 If you decide to depict this data with a histogram what would be the midpoint for the highest interval?- A.
42.5

- B.
40

- C.
42.49

- D.
44.99

- 9.Professor Arenas recently administered a statistics exam and was surprised to see that the distribution of scores was negatively skewed. What would a negatively skewed distribution indicate for this example?
- A.
That most students did well on the exam but a few did very poorly.

- B.
That students were at the extreme; some did very well and others did very poorly.

- C.
That most students did poorly on the exam but a few did very well.

- D.
That there was very little variation in his class; everyone scored about the same.

- 10.A positively-skewed distribution is more likely to occur whenever we have:
- A.
Floor effects.

- B.
A large sample size.

- C.
A wide variety of participants.

- D.
Ceiling effects.

- 11.If students in a college math class are given an exam intended for middle school math students it would probably result in:
- A.
A positively skewed distribution.

- B.
A ceiling effect.

- C.
A normal distribution.

- D.
A floor effect.