Data+ Descriptive Statistics and Central Tendency Quiz

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

5

8

10

No mode exists

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

True

False

Submit

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

True

False

5. 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

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

True

False

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

Mean < Median < Mode

Mode < Median < Mean

Mean = Median = Mode

Median < Mode < Mean

8. A bimodal distribution has exactly two modes.

True

False

Submit

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

Mean

Median

Mode

Range

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

Mean

Median

Mode

Standard deviation

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

Mean

Median

Variance

Standard deviation

Submit

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

Variance

Standard deviation

Coefficient of variation

Z-score

Submit

16. 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

Submit

20. 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

Data+ Descriptive Statistics and Central Tendency Quiz

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

2.

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

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

3. Standard deviation is the ____ of variance.

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

5. Which statement about the median is correct?

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

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

8. A bimodal distribution has exactly two modes.

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

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

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

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

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

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

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

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

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

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

19. Percentiles divide a dataset into ____ equal parts.

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