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, found by adding all the numbers together and then dividing by the total count of numbers.

Front

How do you find the median of a data set?

Back

To find the median, arrange the numbers in order from least to greatest 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 mode in a data set?

Back

The mode is the number that appears most frequently in a data set. A set 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 range of the data set 1.43, 1.05, 34, 56, 89, 1.1?

Back

Range = Maximum - Minimum = 89 - 1.05 = 87.95.

Front

What is the formula to find the mean?

Back

Mean = (Sum of all numbers) / (Total count of numbers).

Front

How do you find the first quartile (Q1)?

Back

Q1 is the median of the lower half of the data set (the first half of the ordered data).

Front

How do you find the third quartile (Q3)?

Back

Q3 is the median of the upper half of the data set (the second half of the ordered data).

Front

What is the process to find the interquartile range?

Back

To find the IQR, calculate Q3 - Q1.