Mean, Median, Mode

Mean, Median, & Mode

Multiple Choice

When we say "average", what are we usually talking about?

• mean

  x̄

• median

• mode

• sum

  Σ

Multiple Select

Which of the following statistics indicate "central tendency"?

• mean

  x̄

• median

• mode

• sum

  Σ

Fill in the Blanks

What is the mean of the following numbers?

10 11 11

(calculate x̄ to 2 decimal places)

Multiple Choice

When given an ordered list of values, which statistic tells us the middle value?

• mean

  x̄

• median

• mode

• sum

  Σ

Fill in the Blanks

What is the median for the following list of numbers?

3 7 11 12 12 12 18

Multiple Choice

When given an ordered list of values, which statistic tells us the most common value?

• mean

  x̄

• median

• mode

• sum

  Σ

Fill in the Blanks

What is the mode for the following list of numbers?

2 7 7 12 18 18 18 20

Multiple Select

Why do we use multiple descriptive statistics when summarizing our data? (pick 2)

• because outliers can throw off averages

• because mathematicians need jobs

• different statistics give different pictures of data

Match

Match the following statistics with their definitions:

• sum

  Σ

• mean

  x̄

• median

• mode

total of all numbers

total Σ ÷ n numbers

middle of number string

most common number

• total of all numbers

• total Σ ÷ n numbers

• middle of number string

• most common number

Poll

Could you calculate mean, median, and mode now?

• YES!

• Maybe.

• With a little more help.

• NO!