Investigating Data

How many people have two or less books in their desk?

• 4

• 5

• 6

• 7

What was the difference between the cars sold on Monday and Tuesday than the cars sold on Friday and Saturday

• 1

• 2

• 3

• 4

How do you construct a frequency polygon?

• Start at bottom left hand corner of first column and draw a straight line through the top right hand corner of each column

• Start at origin and draw a straight line through the centre of each column

• Start at centre of column and draw a straight line through the left hand corner of the next column.

• Start at origin and draw a straight line through the right hand corner of each column

Which graph represents histogram?

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• 
• 

Find the mean of these numbers:

5, 11, 2, 12, 4, 2

• 4.1

• 6

• 4.5

• 4

For which set of scores below is the mean the same as the median?

• 2, 2, 3, 3, 4

• 1, 2, 3, 4, 5, 6, 7, 8

• 3, 4, 4, 4, 5

• 1, 2, 5, 6

Which one of these is a measure of spread?

• interquartile range

• outlier

• mode

• median

Which one of these measures is not part of a five-number summary?

• upper quartile

• median

• lower extreme

• mean

Which one of these measures depends upon the value of every score in the data set?

• mode

• interquartile range

• mean

• range

The six chefs at a restaurant earn the following weekly wages: $520, $610, $610, $630, $660 and $710. How will another wage of $400 affect the mean and median of this set of wages?

• The mean and median will both increase.

• The mean and median will both decrease.

• The mean will increase and the median will decrease.

• The mean will decrease and the median will increase.