Name
Master 7.15a
1.
Date
Unit Test: Unit 7 Data Analysis and Probability
Each graph displays the number of students who were late for class at A.R.C. High School in one
week.
a) What is an advantage of each graph?
b) What is a disadvantage of each graph?
c) Which graph would you choose to show how the number of late students
changed throughout the week?
d) Which graph would you choose to show that the number of late students
was about the same each day?
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Name
Master 7.15b
2.
Date
Unit Test continued
These graphs show the number of sport cards Robbie and Spencer have each collected.
a) What impression does each graph give?
b) Who do you think drew the graphs, Robbie or Spencer? Why?
c) What would you change about the graphs to present the data accurately?
3.
These tables show data about movie ticket sales at Clear View Theatre.
Table A
Table B
Number of Tickets Sold Last Week
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Total Number of Tickets Sold
Ticket Type
Number of
Tickets
Week
Number of
Tickets
Child
553
1
3558
Student
780
2
3459
Adult
1434
3
3010
Senior
312
4
2780
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Name
Master 7.15c
Date
Unit Test continued
a) Graph the data in a misleading way.
b) What impression does your graph give?
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c) Describe how you created that impression.
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________________________________________________________________________
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Name
Master 7.15d
4.
Date
Unit Test continued
A spinner has three congruent sectors coloured orange, green, and purple.
a) Use the rule to find the probability of each event:
i) Landing on orange, then landing on purple.
ii) Landing on the same colour 2 times in a row.
b) Use a tree diagram to verify your answers to part a.
5.
A bag contains 2 red marbles, 1 white marble, and 3 blue marbles. A marble is removed without
looking, its color is recorded, and it is returned to the bag. Find the probability of each event:
a) Removing a red marble, then a white marble, then a blue marble.
b) Removing a marble that is not red 3 times in a row.
c) Removing a blue marble, then a black marble, then a red marble.
d) Removing a blue marble, then a white marble, then 3 red marbles.
74
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