Unit 5 : Stats- Practice

How do you find the median of a data set that has two middle numbers?

• You pick the higher middle number

• You pick the lower middle number

• Add the two middle numbers and divide it by 2

• Subtract the two middle numbers and divide by 2

Find the Inter-Quartile Range (IQR). (Hint: Q3-Q1)

• 7609

• 8924.5

• 2708

• 5416

Find the median, mode and range: 
3, 5, 7, 9, 11, 8, 3

• median:7  mode:3  range:7
• median:6  mode:3  range:7
• median:7  mode:3  range:8

The following table shows the annual salaries earned by employees of a small company. What is the mean?

• 75,650

• 54,950

• 42,750

• 51,000

The graph shows the distribution of scores of 30 students on a mathematics test. Based on the histogram, which statement must be true?

• The lowest test score is 41%.

• The highest test score is 100%.

• The mean test score is between 81% and 90%.

• The median test score is not greater than 80%.

• The lower quartile of the test scores is greater than 60%.

Find the mean of 17, 22, 17, 30, 15, 17, and 8.

• 15

• 16

• 17

• 18

The number or numbers that occur most often.

What is the median in this set of data: 14, 15, 18, 19, 20, 21, 27, 30?

• 19

• 19.5

• 20

• 27

It is the study of collecting, organizing, and interpreting information, or data.

• measures of center

• statistics

• median

• mode

Which is the mode in this set of data: 2, 4, 6, 2, 2, 3, 4, 6, 5?

• 2

• 4

• 5

• 6