Measures of Central Tendencies and Variation

Front

What are the measures of central tendency?

Back

Mean, Median, Mode.

Front

Define Mean.

Back

The average of a set of numbers, calculated by adding all the values and dividing by the number of values.

Front

Define Median.

Back

The middle value in a data set when the numbers are arranged in order.

Front

Define Mode.

Back

The value that appears most frequently in a data set.

Front

What is Range?

Back

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

Front

How many modes can you have in a data set?

Back

Zero, One, Two, or All the above.

Front

Which measure of central tendency is best for skewed data?

Back

Median.

Front

What is the formula for calculating Mean?

Back

Mean = (Sum of all values) / (Number of values).

Front

If the data set is: 3, 4, 5, 4, 5, what is the Mean?

Back

Mean = (3 + 4 + 5 + 4 + 5) / 5 = 4.2.

Front

What two processes are used to find the Mean?

Back

Addition and Division.