Deviation

What does this symbol represent?

• Standard Deviation

• Variance

• Mean Absolute Deviation

• Sigma

Which of the following is a measure of spread, or variability? (select all that apply)

• Interquartile Range

• Standard Deviation

• Mean

• Median

• Range

What does standard deviation represent?

• How many different variations are in the data set.

• How the population varies compared to the sample.

• How spread out each data value is from the mean.

• The range, but with a bunch of other stuff going on.

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

• 1

• 2

• 3

• 4

Find the Mean Absolute Deviation: 10, 9, 3, 8, 10. The Mean is 8

• 3

• 1

• 5

• 2

What is the second step (3) when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean

  (subtract)

• Find the mean of the distances

• Find the mean of the data

What is the third step (4-5) when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean

• Find the mean of the data

• Find the mean of the new set of numbers

  (add, divide)

The daily high temperatures, in degrees Celsius, for two weeks were recorded. The first week had a mean high temperature of 8 degrees Celsius and a mean absolute deviation (MAD) of 1 degree Celsius. Here is a list of the high temperatures, in degrees Celsius, for the second week.

5, 9, 7, 0, 3, 5, 5

What is the mean absolute deviation of the second week? Round to the nearest hundredths.

What is the second step when calculating the Mean Absolute Deviation?

• Find the distance between each value and the mean

• Find the mean of the distances

What is the second step (3) when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean

  (subtract)

• Find the mean of the distances

• Find the mean of the data