Measures of Central Tendency and Finding Missing Values

Estimate the mean weight

• 63.5

• 65

• 67.2

• 70.1

For this table of data, what is the modal class?

• 0-<10

• 30-<40

• 20-<30

• 40-<50

For this grouped data, what is the mean?

• 20

• 25

• 27

• 30

Find the median class of this data.

• 0 < x <= 20

• 20 < x <= 35

• 35 < x <= 45

• 45 < x <= 65

Find the mean.

• 10

• 20

• 30

• 40

For this table of information, how many 1s occurred in the data?

• 3

• 5

• none

• impossible to know

The ____________ is the measure of central tendency that represents the middle number in a set of data.

• Mode

• Average

• Principal

• Median

In order to find the ____________, we add up all of the numbers in the data set and then divide the sum by the number of numbers.

• Average

• Mode

• Upper Quartile

• Median

The number that appears the most in a data set is commonly known as the ___________.

• Mean

• Range

• Mode

• Average

How do we find the median when there are exactly TWO numbers in the middle of the data set?

• We add up all of the numbers and divide by the number of numbers.

• Subtract the lower extreme from the upper extreme.

• Add the two numbers together and divide the sum by 2.

• Use the formula I = P x r x t