Mrs. Taylor, Math 7
Name:_________________________ Date:______________ _____ Block:_____ # _____
PRACTICE TEST - Ch 7 Statistics & Probability
"I CAN"
 I can demonstrate an understanding of central tendency and range by
calculating mean, median, mode and range.
 I can determine the most appropriate measures of central tendency (mean, median, mode) is best to use
in a situation.

I can identify an outlier and determine the effect on the mean, median, and mode when an outlier is included in a
data set.
These are many, but not all, types of questions that you can expect on your test. There will be critical thinking
questions where you will need to apply what you have learned to a new situation. Look over past assignments
and review your Guided Notes. Good luck! 
[7.1-7.3 Mean, Median, Mode & Range]
1. Kyler's team scored 4, 2, 3, 5, 4, 6, 7, 5, 1 goals in their last ten games.
a) Find the range of the scores___________
b) Find the Mean _________ Median _________ Mode ________. Show all work below!
HINT: Start by drawing lines for each score. Cross off. Put in order from Least to Greatest.
2. The median shoe size of eight 12-year-old boys is 6 ½. What might the shoe sizes be?
Explain your answer.
3. Amy recorded the hours she worked each week at her part-time job for 10 weeks. Here
are the hours: 15, 12, 16, 10, 15, 15, 2, 18, 12, 10
Show all work!
Calculate the range ____________
a) Calculate the mean _____________ median _____________ mode ___________.
b) Identify the outlier _________. Should it be included? ______. Explain _______________
_________________________________________________________________________________
Show all work!
4. The times, in minutes, that 14 students in our class spent doing math homework last night:
27, 36, 48, 35, 8, 40, 41, 39, 74, 47,
a) Identify the outlier, if any. ____________
b) Justify your choice (Explain why it is the outlier) ______________________________________
____________________________________________________________________________________
c) Calculate, with the outlier, the mean ___________ median _________ mode __________
d) Calculate, without the outlier, the mean _________ median ________ mode ___________
e) What did you notice? Explain.
____________________________________________________________________________________
____________________________________________________________________________________
f) Which average best describes the data? Explain.
____________________________________________________________________________________
____________________________________________________________________________________
g) Should the outliers be used in reporting the average? Explain.
____________________________________________________________________________________
____________________________________________________________________________________
[7.4 Application of Averages]
5. Which average best describes a typical item in each data set? Explain.
Colour of hoodies sold in a sports store
Test scores of a Grade 7 class
Salaries in a company with 1000 employees
Salaries in a company with only 5
employees.
[7.5 Probability]
6a) What are 4 ways to express probability?
_______________ ___________________ _______________
_____________
6b) Twenty cards are numbered from 1 to 20. The cards are shuffled. A card is drawn. Find
the probability that the card has:
Fraction
Decimal
Percent
Ratio
a multiple of 4
a prime number
(only factors are 1 and
itself)
a number
greater than 30
a number
divisible by 1
[7.6 Tree Diagrams]
7. A spinner has 3 equal sectors labelled D, E, and F. A bag contains 3 congruent cubes: 1
green, 1 red, and 1 blue.
Find the probability of:
1. spinning E?
The pointer is spun and a cube is picked at random.
a) Are these events independent? Explain why or why not.
b) Draw a tree diagram to list the possible outcomes.
2. Picking a green
cube?
3. spinning E and
picking a green cube?
4. spinning D and
picking a red cube?
*Start