Question

is it correct?

Which of the following is a descriptive statistic? O a. An average O b. A bar chart c. A histogram O d. All of these choices are correct.

Answer 1

There are four types of descriptive statistics

1. Measures of Frequency:

* Count, Percent, Frequency

* Shows how often something occurs

* It is used when we want to show how often a response is given

2. Measures of Central Tendency

* Mean, Median, and Mode

* Locates the distribution by various points

* This is used when we want to show how an average or most commonly indicated response

3. Measures of Dispersion or Variation

* Range, Variance, Standard Deviation

* Identifies the spread of scores by stating intervals

* Range = High/Low points

* Variance or Standard Deviation = difference between observed score and mean

* This is used when we want to show how "spread out" the data are. It is helpful to know when your data are so spread out that it affects the mean

4. Measures of Position

* Percentile Ranks, Quartile Ranks

* Describes how scores fall in relation to one another. Relies on standardized scores

* This is used when we want to compare scores to a normalized score (e.g., a national norm)

Hence only average is an example of descriptive statistics.

Hence option a is the correct answer.