Statistics Review

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

How do you calculate the range for the data set: 3, 7, 8, 5, 12, 14, 21, 13, 18?

Back

Range = 21 - 3 = 18.

Front

What does 'no association' mean in statistics?

Back

'No association' means that there is no relationship or correlation between two variables.

Front

What is the mean of a data set?

Back

The mean is the average of all the numbers in a data set, calculated by dividing the sum of the values by the number of values.

Front

How do you find the mean of the data set: 9, 8, 12, 6, 10?

Back

Mean = (9 + 8 + 12 + 6 + 10) / 5 = 9.

Front

What is the median of a data set?

Back

The median is the middle value when the numbers are arranged in order.

Front

How do you find the median of the data set: 3, 17, 17, 11, 8, 13, 5, 18?

Back

First, arrange the data: 3, 5, 8, 11, 13, 17, 17, 18. Median = (11 + 13) / 2 = 12.

Front

What is a positive association in statistics?

Back

A positive association means that as one variable increases, the other variable also tends to increase.

Front

What is a negative association in statistics?

Back

A negative association means that as one variable increases, the other variable tends to decrease.

Front

What is a data set?

Back

A data set is a collection of related data points or values.