Basic statistics

What is the mean of the data 10, 20, 30, 40?

• 1 20
• 2 100
• 3 30
• 4 25

The median of 2, 4, 6, 8 is:

• 1 6
• 2 4
• 3 5
• 4 20

The most frequent value in a data set is the:

• 1 Mode
• 2 Median
• 3 Mean
• 4 Range

The standard deviation measures:

• 1 The mode
• 2 Spread of the data
• 3 The mean only
• 4 The total

The variance is:

• 1 The range squared
• 2 The same as the mode
• 3 The square root of the mean
• 4 The square of the standard deviation