1. A data set has a skew coefficient of 0.5. The mean of this data set is 37 and variance is 4. What is the median of this data set?

Your answer:

2. The mode can be significantly affected by an extremely large value in a data set.

True

False

3. Standard deviation is a measure of spread not resistant to outliers.

True

False

4. The interquartile range is a measure of the sample`s variability and is resistant to outliers.

True

False

5. A data set is said to be skewed if one tail of the distribution has more extreme values than the other tail.

True

False

6. The table shows the masses of fish caught in a fishing competition. Calculate Q3

a. 11 kg

b. 9 kg

c. 13 kg

d. 19 kg

Other:

7. A percentile is the specific data point converted to a percent.

True

False

8. For the data grouped into intervals we use the interval midpoints and frequencies to estimate the measures of central tendency.

True

False

9. According to Chebyshev's rule, at least 3/4 of the measurements in any data set will fall within one standard deviation of the mean.

True

False

10. If the data set is skewed to the right, then the mean is less than the median.

True

False

11. The mean of a data set is 12.5 cm. The variance of this data set is 4.0sq.cm. One of the measurements in this set is 9.5. What is the z-score of this measurement?

a. 0.75

b. -0.75

c. 1.5

d. -1.5

Other:

12. Anil received the following marks on his first five biology tests: 75, 84, 92, 61, and 79. What test score must Anil earn on his sixth test so that his mean mark for all six tests will be 80?

a. 91

b. 85

c. 88

d. 89

Other:

13. Quartile 3 can be considered the median of the upper 50% of data.

True

False

14. The standard deviation is used to determine the central tendency of a data set.

True

False

15. Suppose, the overall mark in a math course is based on 4 categories: K (35%), A (30%), C (20%) and T(15%). Jade`s marks breakdown is K- 80, A - 75, C - 67, T - 72. What is Jade`s overall mark?

a. 73.5

b. 75.8

c. 74.7

d. 72.0

Other:

16. The numbers of parking violations on a main street during each hour from 9am to 5pm are listed: 8, 28, 18, 12, 28, 21, 28, 25. What is the median in this set of data?

a. 21

b. 28

c. 23

d. 25

Other: