1. What is the mean of a data set?

a) The most frequent value in the data set

b) The middle value of the data set when it is sorted

c) The sum of all the values in the data set divided by the

number of values

d) The difference between the largest and smallest values

in the data set

Answer: c) The mean is the average of the data set and it is

calculated by adding all the values and dividing by the

number of values. The mean is a measure of central

tendency that indicates the typical value of the data set.

Rationale: The mean is one of the basic data descriptors

that summarizes the data set with a single number. It is

useful for comparing different data sets or finding trends

over time.

2. What is the median of a data set?

a) The most frequent value in the data set

b) The middle value of the data set when it is sorted

c) The sum of all the values in the data set divided by the

number of values

d) The difference between the largest and smallest values

in the data set

Answer: b) The median is the middle value of the data set

when it is sorted in ascending or descending order. If there

are an even number of values, the median is the average of

the middle two values. The median is another measure of

central tendency that indicates the middle point of the data

distribution.