Data+ Descriptive Statistics and Central Tendency Quiz

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3. Which measure is most appropriate for describing the typical value in a categorical dataset?

Mean

Median

Mode

Standard deviation

4. When comparing two datasets with the same mean, the one with larger standard deviation has greater variability.

True

False

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7. Which of the following is a resistant measure of central tendency?

Mean

Median

Variance

Standard deviation

8. A bimodal distribution has exactly two modes.

True

False

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10. Which measure of dispersion is expressed in the same units as the original data?

Variance

Standard deviation

Coefficient of variation

Z-score

11. Which measure of central tendency is most affected by extreme outliers in a dataset?

Mean

Median

Mode

Range

12. In a right-skewed distribution, which relationship typically holds?

Mean < Median < Mode

Mode < Median < Mean

Mean = Median = Mode

Median < Mode < Mean

13. The interquartile range (IQR) measures the spread of the middle 50% of data.

True

False

14. Which statement about the median is correct?

It is always equal to the mean

It divides a dataset into two equal halves

It is always the most frequent value

It cannot be calculated for even-sized datasets

15. A dataset has a mean of 50 and standard deviation of 10. A value of 70 is how many standard deviations from the mean?

1

2

3

4

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17. Which of the following best describes variance in a dataset?

The difference between max and min values

The average squared deviation from the mean

The most frequently occurring value

The middle value when data is ordered

18. In a perfectly symmetrical distribution, the mean, median, and mode are equal.

True

False

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20. A dataset contains the values: 5, 8, 8, 12, 15. What is the mode?

5

8

10

No mode exists

Data+ Descriptive Statistics and Central Tendency Quiz

1. A dataset's range is the ____ between the maximum and minimum values.

2.

What first name or nickname would you like us to use?

2. A dataset is considered approximately normal if roughly 68% of values fall within one ____ of the mean.

3. Which measure is most appropriate for describing the typical value in a categorical dataset?

4. When comparing two datasets with the same mean, the one with larger standard deviation has greater variability.

5. The 25th percentile is also known as the first ____.

6. Percentiles divide a dataset into ____ equal parts.

7. Which of the following is a resistant measure of central tendency?

8. A bimodal distribution has exactly two modes.

9. The coefficient of variation is calculated as standard deviation divided by the ____.

10. Which measure of dispersion is expressed in the same units as the original data?

11. Which measure of central tendency is most affected by extreme outliers in a dataset?

12. In a right-skewed distribution, which relationship typically holds?

13. The interquartile range (IQR) measures the spread of the middle 50% of data.

14. Which statement about the median is correct?

15. A dataset has a mean of 50 and standard deviation of 10. A value of 70 is how many standard deviations from the mean?

16. Standard deviation is the ____ of variance.

17. Which of the following best describes variance in a dataset?

18. In a perfectly symmetrical distribution, the mean, median, and mode are equal.

19. The median of a dataset with an even number of observations is calculated by ____.

20. A dataset contains the values: 5, 8, 8, 12, 15. What is the mode?