Measure of Central Tendency

Front

What is the mean of a data set?

Back

The mean is the average of a data set, calculated by finding the sum of all numbers and then dividing by the total count of numbers.

Front

How do you find the median of a data set?

Back

The median is the middle number in a sorted data set. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the mode of a data set?

Back

The mode is the number that appears most frequently in a data set. A data set can have one mode, more than one mode, or no mode at all.

Front

Can there be more than one mode in a data set?

Back

Yes, a data set can have multiple modes if two or more numbers appear with the same highest frequency.

Front

What is the first step in analyzing a data set?

Back

The first step is to organize the data, typically by putting the numbers in order from least to greatest.

Front

How do you calculate the mean of the numbers 1, 2, 3, 4, and 5?

Back

Add the numbers (1+2+3+4+5 = 15) and divide by the total count (5). The mean is 3.

Front

What is the range of a data set?

Back

The range is the difference between the maximum and minimum values in a data set.

Front

What does it mean if a data set has no mode?

Back

If a data set has no mode, it means that no number appears more than once.

Front

What is the importance of measures of central tendency?

Back

Measures of central tendency (mean, median, mode) summarize a data set with a single value that represents the center of the data.

Front

How do you find the median in an even-numbered data set?

Back

To find the median in an even-numbered data set, average the two middle numbers after sorting the data.