Exam 3: Measures of Central Tendency

The sum of the differences between the scores of a distribution and the mean of the scores is always________.

In a small seminar class, there were eight students who identify as Protestant, four as Catholics, three as Jewish, two as Muslim, one as Buddhist, and seven students who have no religious affiliation. The mode for the variable religious affiliation is________.

To compute a median for scores that have been grouped into a frequency distribution, we assume that the scores in each interval are________.

If the scores of an even number of cases are arranged from high to low, the median is________.

The most appropriate measure of central tendency for gender would be the________.

The three commonly used measures of central tendency (mode, median, and mean) ________.

The median cannot be found for variables measured at the nominal level because________.

To compute a mean for scores that have been grouped into a frequency distribution, we assume that the scores in each interval are________.

Income distributions almost always have a positive skew (since there are only a few very wealthy people). Therefore, the preferred measure of central tendency for this variable would be the________.

The mode measures "central tendency" in terms of the most________.

The expressionΣ(Xi) directs us to find the________.

What is the median of the following set of eleven grades? 55 60 62 67 70 72 75 76 77 85 95

The grades on a final exam for a statistics class are as follows: 25% As, 35% Bs, 30% Cs, 9% Ds and 1% Fs. The modal grade of the class is________.

In any distribution, the mean and the median will have the same value when the distribution is________.

If you subtracted the mean from each score in a distribution, squared the differences, and then added the squared differences, the sum would be________.

The purpose of measures of central tendency is to describe what value of a distribution of scores is________.

What is the mean of the following scores? 13 18 23 35 41