Mean, Median, Mode, Range, Interquartile Range

Front

What is the mean of a set of numbers?

Back

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

Front

How do you find the median of a set of numbers?

Back

To find the median, arrange the numbers in order from least to greatest. If there is an odd number of values, the median is the middle number. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is mode in a data set?

Back

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

Front

Define range in statistics.

Back

The range is the difference between the highest and lowest values in a data set.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the third quartile (Q3) and the first quartile (Q1) in a data set, representing the middle 50% of the data.

Front

How do you calculate the IQR?

Back

To calculate the IQR, first find Q1 (the median of the lower half of the data) and Q3 (the median of the upper half of the data). Then subtract Q1 from Q3: IQR = Q3 - Q1.

Front

What is the first quartile (Q1)?

Back

The first quartile (Q1) is the median of the lower half of a data set, which separates the lowest 25% of the data from the rest.

Front

What is the third quartile (Q3)?

Back

The third quartile (Q3) is the median of the upper half of a data set, which separates the highest 25% of the data from the rest.

Front

How do you find the mode of a data set?

Back

To find the mode, count how many times each number appears in the data set. The number that appears the most is the mode.

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.