Question 1 (2 points)
What do we use measures of variance for when working with sets of numbers?

What were these measures of central tendency for Fred's data?
1. The mean of Fred's data is miles per gallon.
2. The median of Fred's data is miles per gallon.
Note: Where necessary, please round your answers to the nearest tenth (one decimal place out).
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What were these measures of variation for Fred's data?
1. The range of Fred's data is miles per gallon.
2. The interquartile range (IQR) of Fred's data is miles per gallon.
3. The standard deviation of Fred's data is miles per gallon.
Note: Where necessary, please round your answers to the nearest tenth (one decimal place out).
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In the last part of this problem, you were testing to see if the largest numbers may be affecting the mean and standard deviation of the data.
Take out the numbers 29 and 30 (so that you only have 8 numbers in the set). Then re-calculate the following measures:
1. The mean with just the 8 numbers is miles per gallon.
2. The standard deviation of this new set is miles per gallon (round to the nearest tenth).
Note: Where necessary, please round your answers to the nearest hundredth (two decimal places out).
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1. The standard deviation of the set with 10 numbers was miles per gallon (round to the nearest tenth).
2. The standard deviation of the set with 8 numbers was miles per gallon (round to the nearest tenth).
3. This would indicate that the numbers 29 and 30 (are/are not) outliers in this set of data because
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What were these measures of central tendency for the t.v. data including all 12 numbers?
1. The mean of this data is televisions.
2. The standard deviation of this data is televisions.
Note: Where necessary, please round your answers to the nearest tenth (one decimal place out).
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Describe how you would test for outliers in the tv scenario. If there is an outlier, state what it is and why you would qualify it as an outlier.

The number 54 seems to be out of place in this series of numbers. Let's compare numbers
1.) The standard deviation of the set with 12 numbers was tvs (round to the nearest tenth). Take out the 54 so that only 11 numbers are included from the data.
2.) The standard deviation of the set with 11 numbers was tvs (round to the nearest tenth).
3.) The best way to describe the overall data would be to include (11 or 12) data values because.
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Question 1 (2 points) What do we use measures of variance for when...