10.1 Measures of Center

10.1 Measures of Center

New mini chapter! You will have some informational slides to read, some NOTES to write down, and some practice problems.

Statistics: working with numerical data

(more specifically, the process of collecting, organizing, analyzing interpreting, and presenting numerical data)

Data set:

a collection (or list) of values

Two measures that describe a data set

• measures of center (describes average value)

• measures of variation (describes the spread of the data)

Please title your notes page as shown^

the first measure on our list is

MEAN

add the term and definition^

Next up: MEDIAN

use the next slide to add this term and definition to your notes

Last term: MODE

use the next slide to add this term and definition to your notes

In your notes, write down the following data set (I've graciously ordered it for you already.)

4, 5, 8, 8, 9, 9, 10, 12

4, 5, 8, 8, 9, 9, 10, 12

Now find the mean, median, and mode.

Fill in the Blanks

4, 5, 8, 8, 9, 9, 10, 12 What is the mean? Round to the nearest tenth.

Fill in the Blanks

4, 5, 8, 8, 9, 9, 10, 12 What is the median?

Multiple Choice

4, 5, 8, 8, 9, 9, 10, 12 What is the mode?

• 8

• 9

• 8 and 9

• No mode.