# Square Roots Print Activity by malj

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Central Tendency Print Activity

Use the “Explore It” mode to answer the following questions:

1. Use the diagram below to answer the following questions:

a. The graph represents the heights of a collection of ____ artifacts.
(7/8/9)

b. The Range in the heights of the artifacts is 9 – 1 =                    m.

c. The Range is defined as the __________ height – __________ height.
(largest/smallest)         (largest/smallest)

d. The ___________ represents the average height of the artifacts.
(mean/median/mode)

e. The Mean is defined as ____sum_____ = ______ =                               .

f. In the diagram above, the heights have been arranged in _______________ order.
(ascending/descending)

g. The Median is the value that represents the ________________ height
(beginning/middle/end)
when the heights are arranged in order.

Junior High Math Interactives                                                                      Page 1 of 7
2006 Alberta Education (www.LearnAlberta.ca)

Statistics and Probability/ Central Tendency / Object Interactive / Print Activity
h. The Median height for this data is                      .

i. The Modes are the values that occur ____________ often in a set of data.
(least/most)

j. The value of the heights that occurs most often are                       and     .

2. Use the data in the diagram below to answer the following questions:

a. The graph represents the ____________ of ________ artifacts.
(length/width/height)    (2/5/10)

b. The range of lengths is                  –         =             m.

sum
c. The mean length = _________ = ______ =                                .
# of items

d. The lengths arranged in ascending order are ____, ____, ____, ____, ____.

e. The median length is                 .

f. This data has ______________________.
(2 modes/no modes)

Junior High Math Interactives                                                          Page 2 of 7
2006 Alberta Education (www.LearnAlberta.ca)

Statistics and Probability/ Central Tendency / Object Interactive / Print Activity
3. Use the data table below to answer the following questions:

a. The data represents the ___________________ of the artifacts.
(length/width/height)

b. The range for the widths is                   –             =      m.

c. The mean width is _____ =                     .

d. When the data is arranged in ascending order, the middle 2 widths are

and          .

e. When there is an ________ number of data values, the median is found by
(even/odd)

arranging the data in order and averaging the 2 data values in the middle.

____  ____
f. The median width for this example is                                   .
2

Junior High Math Interactives                                                        Page 3 of 7
2006 Alberta Education (www.LearnAlberta.ca)

Statistics and Probability/ Central Tendency / Object Interactive / Print Activity
4. Use the data table below to answer the following questions:

a. There are           data values in the data table.

b. The range in height is                   –        =       .

c. The mean height is ____                      .

d. When the heights are arranged in order, the middle 2 heights are          and

____  ____
e. The median height is                                 .
2

g. The most frequent heights of the artifacts are                and   and these
values represent the ___________________.
(mean/median/mode)

Junior High Math Interactives                                                        Page 4 of 7
2006 Alberta Education (www.LearnAlberta.ca)

Statistics and Probability/ Central Tendency / Object Interactive / Print Activity
5. The data table below represents a list of Amy’s math quiz marks.

a. Input Amy’s marks into the data table on your screen.

Data Table:

b. Using the information on your screen, draw and include ALL labels on the bar
graph below.

Graph:

c. The graph displays the math quiz marks for              different math topics.

d. The quizzes are graded as a mark out of        .

e. Amy achieved the highest quiz mark on the topic of                              .

f. The lowest mark Amy achieved on any quiz was           out of 10.

Junior High Math Interactives                                                        Page 5 of 7
2006 Alberta Education (www.LearnAlberta.ca)

Statistics and Probability/ Central Tendency / Object Interactive / Print Activity
g. The range of Amy’s marks was                  –              =       .

h. The average mark was _____ =                      .

i. The middle values when the marks are arranged in order are                           and         .

____  ____
j. The median mark is                                   .
2

k. The most frequent marks Amy received were _______________.

l. Did Amy achieve a passing average on these math quizzes? _____
(yes/no)

6. A favorite music survey was conducted with students.
Use the data table and graph below to answer the following questions:

Data Table:                                 Graph:

a. The horizontal axis displays                              different types of music on the graph.

b. The vertical axis defines the _______________ or number of students that chose
each music type.

c. The number of students who chose country as their favorite was                               .

d. The number of students who chose either pop rock or heavy metal was
.

Junior High Math Interactives                                                                     Page 6 of 7
2006 Alberta Education (www.LearnAlberta.ca)

Statistics and Probability/ Central Tendency / Object Interactive / Print Activity
e.       The music type with the lowest frequency was ________________.

f.       The total number of students participating in the music survey was
.

g.       Of the 3 measures of central tendency, the __________________ have
(mean/median/mode)
meaning in this data set.

h.    Explain why.
________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

7. Match the following terms with their correct definition:

a. Mean          ____ the data value that occurs most often.

b. Median        ____ the difference between the largest and smallest data values.

c. Mode          ____ the sum of the data divided by the number of data values.

d. Range         ____ the value that represents the middle when data is arranged in
order.

Junior High Math Interactives                                                        Page 7 of 7
2006 Alberta Education (www.LearnAlberta.ca)

Statistics and Probability/ Central Tendency / Object Interactive / Print Activity

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