Measures of Central Tendency Quiz

What measure of central tendency is typically referred to as the "average"?

• Mode

• Median

• Mean

• Range

What is the mean of the following data set: 10, 15, 20, 25, 30?

• 20

• 25

• 15

• 30

In an ungrouped data set, the median is:

• The most frequent value

• The middle value

• The average value

• The sum of all values divided by their count

If a data set has no repeating numbers, the mode is:

• Zero

• Undefined

• The smallest number

• The largest number

In a bimodal data set, there are:

• No modes

• Two modes

• Multiple modes

• No central tendency

For the data set 3, 7, 7, 10, 12, the mode is:

• 7

• 10

• 3

• 12

What is the median of the data set 4, 9, 11, 17, 20, 23, 25?

• 17

• 11

• 20

• 23

What is the range of a data set?

• The difference between the highest and lowest values

• The most frequently occurring value

• The midpoint of values

• The sum of all values

The formula for calculating the weighted mean is:

• Σx/n

• Σ(w * x)/Σw

• Σx/Σw

• Σ(x + w)/Σw

If grades of A, B, C, D have weights of 4, 3, 2, and 1 respectively, what is the weighted mean for grades A, B, and B?

• 2.5

• 3

• 3.33

• 2