Affect on Mean

Front

What is the mean?

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 does dropping the lowest grade affect the mean?

Back

Dropping the lowest grade typically increases the mean, as it removes a lower value from the calculation.

Front

What is an outlier?

Back

An outlier is a value in a data set that is significantly higher or lower than the other values.

Front

How do you find the mean of a data set?

Back

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

Front

What happens to the mean if a new lower score is added?

Back

The mean will generally decrease if a new lower score is added to the data set.

Front

What is the effect of removing an outlier on the mean?

Back

Removing an outlier can significantly change the mean, often making it more representative of the remaining data.

Front

Calculate the mean of the following scores: 90, 85, 65, 95, 83, 97.

Back

Mean = (90 + 85 + 65 + 95 + 83 + 97) / 6 = 85.

Front

Identify the outlier in this set: 9, 9, 5, 7, 16, 11, 18, 12, 82.

Back

The outlier is 82.

Front

Identify the outlier in this set: 23, 27, 30, 34, 154.

Back

The outlier is 154.

Front

Calculate the mean of the following scores: 98, 86, 90, 95, 72.

Back

Mean = (98 + 86 + 90 + 95 + 72) / 5 = 88.2.