Introductory statistics UE Past Papers Questions.

In computing descriptive statistics from grouped data,

1. Data values are treated as if they occur at the mid point of a class
2. The grouped data result is more accurate than the ungrouped result
3. The gropued data computations are used only when a population is being analyzed
4. None of these alternatives is correct

Answer / Solution

UNSOLVED

The measure of dispersion that is influenced most by extreme values is

1. The variance
2. The standard deviation
3. The range
4. The interquartile range

Answer / Solution

UNSOLVED

When should measures of location and dispersion be  computed from grouped data rather than from individual data values?

1. As much as possible since computations are easier
2. Only when individual data values are unavailable
3. Whenever computer packages for descriptive statistics  are unavailable
4. Only when the data are from a population.

Answer / Solution

UNSOLVED

The descriptive measure of dispersion that is based on the concept of a deviation about the mean is

1. The range
2. The interquartile range
3. The absolute value of the range
4. The standard deviation

Answer / Solution

UNSOLVED

The measure of loaction which is the most likely to be influenced by extreme values in the data set is

1. Mean
2. Median
3. Mode
4. Variance

Answer / Solution

UNSOLVED