Using Measures of Center and Measures of Variability

Using Measures of Center and Measures of Variability

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Multiple Choice

Find the mean:

28, 18, 19, 18, 17

• 20

• 18

• 11

• 19

Multiple Choice

Find the median:

5, 6, 3, 9, 0, 4, 1, 2, 7

• 4

• 4.1

• 5

• 4.5

Multiple Choice

Find the mode:

5, 0, 9, 9, 3, 0, 5, 5, 4

• 9

• 5

• 3

• 7

Multiple Choice

What is the range?

• 6

• 2 - 8

• 3

• 4

Multiple Choice

Identify the outlier for the given data?

23, 34, 27, 7, 30, 26, 28, 31, 34

• 7

• 23

• 31

• 34

How can we use the measures of center to compare data sets or populations?

• Compare the medians

• Compare the range of each

• What does the range tell you?

• The correct answer is A

• Compare the mean of each

• Compare the range of each

• Which class did better?

• Third period did better.

Multiple Choice

At a pet store, the lizards in aquarium A have a mean length of 13 cm and a range from 9 cm to 15 cm. In aquarium B, the lizards have a mean length of 15 cm and a range from 14 cm to 17 cm. Which statement BEST compares the lizards in the two aquariums?

• On average, the lizards in aquarium A are longer.

• On average, the lizards in aquarium B are longer.

• Aquarium A has the longest lizard at this pet store.

• The lizards in aquarium B vary in length more than aquarium A.

Multiple Choice

The annual salary for a computer technician at Company A ranges from $41,000 to $63,000, with a mean of $58,000. At Company B, the annual salary for the same position ranges from $45,000 to $$65,000, with a mean of $56,000. Which statement is TRUE when comparing the salaries of computer technicians for the two companies?

• The highest paid computer technician works at Company A.

• B)On average, a computer technician at Company A earns more than at Company B.

• On average, a computer technician at Company B earns more than at Company A.

• Salaries for computer technicians at Company B vary more than salaries at Company A.

Multiple Choice

Brad and Tom are comparing their classes' scores on a math test. Both of their classes had mean scores of 80 on the test, but Brad's class had a range of 6 while Tom's class had a range of 30. If the highest possible score was 100, which class had the LOWEST score in it?

• Brad's class had the lowest score in it.

• Tom's class had the lowest score in it.

• The lowest score occurred in both classes.

• It cannot be determined from the information.

Poll

How do you feel about using measures of center to compare data?