Chapter 6

Which of the following is not a measure of dispersion?
1. Standard deviation
2. Variance
3. Median
4. Quartile deviation
Measures of location and of dispersion are often used together, which of these is not a pair?
1. Mean & standard deviation
2. Median & quartile deviation
3. Mode & range
4. Mean & variance
Data Set 1: 8, 12, 14, 6, 12, 19, 27

For Data Set 1 the Range is:
1. 5.5
2. 6.5
3. 19
4. 23
For Data Set 1 the standard deviation is:
1. 5.5
2. 6.5
3. 21
4. 23
For Data Set 1 the quartile deviation is:
1. 5.5
2. 6.5
3. 21
4. 23
For Data Set 1 the variance is:
1. 30.25
2. 43.14
3. 441
4. 529
Data Set 2: mean = 30, median = 25, standard deviation = 4

For data set 2 the coefficient of variation is
1. -3.75
2. +3.75
3. +7.5
4. +13.3
For data set 2 the coefficient of skewness is
1. -3.75
2. +3.75
3. +7.5
4. +13.3
A decile represents a point in the data
1. At a 10% value
2. At a 5% value
3. At a 1% value
4. At none of these
Highly skewed data is best described by
1. Range
2. Variance
3. Quartile deviation
4. Percentiles