(i) Circle the correct answer. 8. Which of the following is not affected by an extreme value in a data set? (a) The mean absolute deviation [b] The median [c] The range [d] The standard deviation 9. A statement is made that the average distance from the mean in a set of data values is 10. Which measure is being used here? (a) The range [b] The interquartile range [c] The mean absolute deviation [d] The standard deviation 10. A single numerical value used to describe a characteristic of a sample data set, such as the median of the sample, is referred to as a [a] sample parameter [b] population parameter [c] sample statistic [d] population statistic 11. If a symmetric distribution has zero variance, which of the following is true? (a) All the values are positive. [b] All the values are negative. [c] The amount of positive values and the amount of negative values are equal [d] All the values are equal to each other