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Math 225 Quiz 2 Name:_________________
For questions 1-4, consider the following data set: 4 3 6 2 8 8
1. What is the median of the data set?
a. 4
b. 5
c. 2
d. 4.5
2. If I change one of the 8’s in the data set to 18, how would that change the median?
a. The median would be higher
b. The median would be lower
c. The median would remain the same
3. If I change one of the 8’s in the data set to 18, how would that change the mean?
a. The mean would be higher
b. The mean would be lower
c. The mean would remain the same
4. What is the mode of the data set?
a. there is no mode
b. 8
c. 2
5. For the distribution in the picture
a. mean ≈ median
b. mean < median
c. mean > median
d. Can’t tell the relationship of the mean and the median without looking at the data.
6. Which one of these is NOT true about the standard deviation?
a. The standard deviation is zero only if the observations are all the same.
b. The standard deviation has the same unit as the data.
c. The standard deviation is used as a measure of spread when the mean is use as the
measure of center.
d. The standard deviation is resistant to outliers.
