### Frequency Distribution Graph, Bar Graph, Frequency, Nominal, Distribution, Quiz

The key terms in these Statistic chapters include Frequency Distribution Graph, Bar Graph, Frequency, Nominal, Distribution, Sample, Data, Variable, Interval, Research Study, Frequency Distribution, Quiz, Histogram, Polygon, Frequency Distribution Table

In a frequency distribution graph, frequencies are presented on the ______, and the scores (categories) are listed on the_____.

**Y axis; X axis**

If a distribution of scores is shown in a bar graph, you know that the scores were measured on a(n) _________ scale of measurement.

**Nominal or ordinal**

A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3. If these scores are placed in a frequency distribution table, how many X values will be listed in the first column?

**9**

A professor records the number of students who are absent each day for the semester. Because this is a discrete variable, a bar graph should be used to show the frequency distribution.

**FALSE**

For the data in the following table, what is the value of ΣX ?

X f

4 1

3 2

2 4

1 2

**20**

If the following distribution were shown in a histogram, the width of the bar above the 15-19 interval would reach from _____ to _____.

X f

20-24 2

15-19 5

10-14 4

5-9 1

**X = 14.5 to X = 19.5**

Researchers are interested in what determines how easily people are persuaded. Half of the participants used in this study are male, and half are female. During the session, participants rate their attitude towards an increase in fees that has been proposed at their school. Following this, they listen to a persuasive message providing strong arguments in favor of the fee increase. Finally, they re-rate their attitude towards the proposed fee.

**Correlational**

For the data in the following table, what is the value of ΣX^2?

X f

4 1

3 2

2 1

1 3

**30**

For the following frequency distribution, what is ΣX?

X f

30-34 1

25-29 1

20-24 3

15-19 2

10-14 1

**Cannot be determined**

For the following data, N = _____.

X f

4 2

3 4

2 3

1 2

**11 (Add up f values)**

A researcher is interested in the eating behavior of rats and selects a group of 25 rats to be tested in a research study. The group of 25 rats is an example of a ______.

**Sample**

Researchers want to test whether increased alcohol consumption leads to risky decisions. What is the independent variable?

**Alcohol consumption**

A biologist records the number of trout, bass, perch, and other types of fish caught in a local lake during a 2-week period. If the results are organized in a frequency distribution table, what values would be listed in the first column?

**Different types of fish**

For the following frequency distribution of quiz scores, how many individuals took the quiz?

X f

5 6

4 5

3 5

2 3

1 2

**21**** ****(Add up f values)**

For the following frequency distribution of exam scores, how many students had scores higher than X = 79?

X f

90-94 3

85-89 4

80-84 5

75-79 2

70-74 1

**12**

What frequency distribution graph is appropriate for scores measured on a nominal scale?

**Only a bar graph**

For the following frequency distribution of quiz scores, how many individuals took the quiz?

X f

5 6

4 5

3 5

2 3

1 2

**21**** ****(Add up f values)**

For the following frequency distribution of exam scores, how many students had scores higher than X = 79?

X f

90-94 3

85-89 4

80-84 5

75-79 2

70-74 1

**12**

A set of scores ranges from a high of X = 96 to a low of X = 11. If these scores were placed in a grouped frequency distribution table, what is the best value for the interval width?

**10 points**

What is the total number of scores for the distribution shown in the following table?

X f

4 3

3 5

2 4

1 2

**14**

For the data in the following table, what is the value of ΣX ?

X f

4 1

3 2

2 4

1 2

**20**

A researcher surveys a sample of n = 200 college students and asks each person to identify his or her favorite movie from the past year. If the results were presented in a frequency distribution graph, what kind of graph would be appropriate?

**A bar graph**

For the following distribution of quiz scores, if a score of X = 3 or higher is needed for a passing grade, how many individuals failed the quiz?

X f

5 6

4 5

3 5

2 3

1 2

**5**

Researchers want to see if paying artists for their work causes them to lose motivation to work on their art. What is the independent variable?

**Paying artist or not paying artists**

A researcher uses an anonymous survey to investigate the television-viewing habits of American adolescents. The goal of the research is to determine the average number of hours each day that American adolescents spend watching television. The researcher is trying to determine a number that is an example of a _____.

**Parameter**

Which types of graphs are used for data from an interval scale?

**Histograms and polygons**

For the data in the following table, what is the value of ΣX^2?

X f

4 1

3 2

2 1

1 3

**30**

For the following frequency distribution, what is ΣX?

X f

30-34 1

25-29 1

20-24 3

15-19 2

10-14 1

**Cannot be determined**

For the following data, N = _____.

X f

4 2

3 4

2 3

1 2

**11**** ****(Add up f values)**

A set of scores ranges from a high of X = 24 to a low of X = 5. If these scores were put in a frequency distribution table with an interval width of 2 points, which of the following would be the top interval in the table?

**24-25**

For the following frequency distribution of quiz scores, how many individuals took the quiz?

X f

5 6

4 5

3 5

2 3

1 2

**21**** ****(Add up f values)**

For the following frequency distribution of exam scores, how many students had scores higher than X = 79?

X f

90-94 3

85-89 4

80-84 5

75-79 2

70-74 1

**12**

If a frequency distribution is presented in a polygon, then the scores were measured on an interval or a ratio scale.

**True**

For the data in the following table, what is the value of ΣX ?

X f

4 1

3 2

2 4

1 2

**20**