Measures of Central Tendency

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

How do you find the median of a data set?

Back

To find the median, arrange the numbers in ascending order and identify the middle number. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the mode in a data set?

Back

The mode is the value that occurs most frequently in a data set.

Front

Given the data set: 88, 85, 72, 68, 84, 93, 84, 78, 93, 81, what is the mode?

Back

93 and 84

Front

What is Q1 in a data set?

Back

Q1, or the first quartile, is the median of the lower half of a data set, representing the 25th percentile.

Front

Given the data set: 74, 70, 75, 90, 85, 86, 81, 78, 92, 86, what is Q1?

Back

75

Front

How do you calculate the mean of a data set?

Back

Add all the numbers in the data set and divide by the total number of values.

Front

Given the data set: 48, 50, 52, 46, 44, 58, 56, 56, 52, 56, what is the mean?

Back

51.8

Front

What is the range of a data set?

Back

The range is the difference between the highest and lowest 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.