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Supplementary objective test questions

8.3 A graphical presentation of classified data in which the number of items in
each class is represented by the area of the bar is called

A an ogive

B a histogram

C a bar chart

D a compound bar chart

8.4 A cumulative frequency distribution for salaries has been produced as follows:

Salary Cumulative frequency

Less than or equal to $8,000 5
Less than or equal to $10,000 9
Less than or equal to $12,000 14
Less than or equal to $15,000 18
Less than or equal to $20,000 26
Less than or equal to $25,000 29

How many people were paid $20,000 or less but more than $10,000?

A 17

B 26

C 41

D 58

8.5 If, on a scatter graph, the data points are lined up so that if a line of best fit
were to be drawn it would be a straight line sloping downwards from left to
right and each data point was very close to the line, the type of correlation
this would represent would be:

A perfect positive correlation

B perfect negative correlation

C strong positive correlation

D strong negative correlation

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