Standard Deviation

On a standardized test, Cathy had a score of 74, which was exactly 1 standard deviation below the mean. If the standard deviation for the test is 6, what is the mean score for the test?

• 71

• 77

• 80

• 68

To find the _________ you add up all the numbers and then divide by how many numbers you have.

• Mean
• Median
• Mode
• Range

The shoe size for all the pairs of shoes in a person's closet is recorded.

7, 7, 7, 7, 7, 7, 7, 7, 7, 7

What is the mean?

What is the standard deviation?

Which of these best estimates the standard deviation of points in a card game?

• 5 points

• 20 points

• 50 points

• 500 points

Standard Deviation is a measure of

• Center

• Variability

The low temperature in degrees Celsius for some cities on the same days in March is recorded in the dot plots.

Decide if the statement is true or false.

The standard deviation of Christchurch’s temperatures is zero because the data is symmetric.

• True

• False

The low temperature in degrees Celsius for some cities on the same days in March is recorded in the dot plots.

Decide if the statement is true or false.

The standard deviation of St. Louis’s temperatures is equal to the standard deviation of Chicago’s temperatures.

• True

• False

The low temperature in degrees Celsius for some cities on the same days in March is recorded in the dot plots.

Decide if the statement is true or false.

The standard deviation of Chicago’s temperatures is less than the standard deviation of London’s temperatures.

• True

• False

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.