Statistics Review

Front

What is the definition of median in statistics?

Back

The median is the middle value in a data set when the numbers are arranged in ascending or descending order.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, add all the numbers in the data set and then divide by the total number of values.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

How do you find the median of an even set of numbers?

Back

For an even set, the median is the average of the two middle numbers after sorting the data.

Front

What is the formula for calculating standard deviation?

Back

Standard deviation = sqrt(Σ(xi - μ)² / N), where μ is the mean and N is the number of values.

Front

What does a low standard deviation indicate about a data set?

Back

A low standard deviation indicates that the values tend to be close to the mean, showing less variability.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when arranged in order.

Front

How do you determine the mode of a data set?

Back

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

Front

What is the range of a data set?

Back

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

Front

How do you calculate the mean of the following data set: 1, 2, 3, 4, 5?

Back

Mean = (1 + 2 + 3 + 4 + 5) / 5 = 3.