Questions & Answers
Browse all 18 questions from the
Elementary Statistics Mastery study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which statistical measure represents the middle value in a numerically ordered data set?
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A
Mean
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B
Median
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C
Mode
-
D
Range
2
If a data set has two values that both appear with the highest frequency, what is the data set called?
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A
Bimodal
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B
Unimodal
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C
Multimodal
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D
Non-modal
3
Which term describes the difference between the maximum and minimum values in a data set?
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A
Average
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B
Deviation
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C
Range
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D
Frequency
4
In a stem-and-leaf plot, what does the 'stem' typically represent?
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A
The frequency count
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B
The individual data units
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C
The leading digit(s)
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D
The total sum
5
Which measure of central tendency is calculated by adding all values and dividing by the count?
-
A
Mean
-
B
Mode
-
C
Range
-
D
Median
6
When interpreting a bar graph, what does the height of each bar represent?
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A
The range
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B
The mean
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C
The frequency
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D
The interval
7
Which chart type is most effective for displaying how a whole is divided into proportional parts?
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A
Bar graph
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B
Line plot
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C
Pie chart
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D
Stem-and-leaf plot
8
What is the 'mode' of the following data set: 2, 4, 4, 7, 8, 8, 8, 9?
9
In a frequency table, what does the 'tally' column indicate?
-
A
The total sum
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B
The number of occurrences
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C
The range of data
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D
The average value
10
Which type of data is collected by counting objects, such as the number of students in a class?
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A
Discrete data
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B
Continuous data
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C
Categorical data
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D
Ordinal data
11
If a survey question asks for a favourite colour, what type of data is being collected?
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A
Numerical
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B
Discrete
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C
Categorical
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D
Continuous
12
What is the range of the set: 12, 15, 18, 22, 25?
13
Which graph type is best suited for showing trends in data over a period of time?
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A
Pie chart
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B
Line graph
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C
Scatter plot
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D
Bar graph
14
In a set of data, what is the 'outlier'?
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A
The middle value
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B
The most frequent value
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C
A value significantly different from others
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D
The sum of the values
15
What is the median of the following set: 3, 7, 1, 9, 5?
16
When collecting data through an experiment, what is the set of all possible outcomes called?
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A
Sample space
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B
Frequency
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C
Range
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D
Distribution
17
What does the 'x-axis' on a standard bar graph usually represent?
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A
The frequency
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B
The categories
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C
The title
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D
The legend
18
Which statistical term refers to the 'most common' value in a data set?
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A
Mean
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B
Median
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C
Mode
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D
Range
