Online Test — Data Representation
10 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 10
What is the frequency of the number 7 in the data: 7, 5, 7, 8, 7, 6, 7, 9?
3
4
5
6
Explanation: 7 appears 4 times in the data set
Question 2 of 10
Which graph is best for showing parts of a whole?
Bar graph
Histogram
Pie chart
Line graph
Explanation: Pie chart shows proportions of a total
Question 3 of 10
In a histogram, the bars:
Have gaps
Touch each other
Overlap
Are arranged randomly
Explanation: Histograms show continuous data with touching bars
Question 4 of 10
A stem-and-leaf plot is useful because it:
Shows only averages
Shows every data point
Uses only even numbers
Cannot be sorted
Explanation: It displays all original data values
Question 5 of 10
If a pie chart sector represents 25% of the data, its angle is:
25°
50°
90°
360°
Explanation: 25% of 360° = 0.25 × 360° = 90°
Question 6 of 10
A line graph is best for showing:
Parts of a whole
Data distribution
Trends over time
Categorical comparison
Explanation: Line graphs connect points to show changes/trends
Question 7 of 10
In a frequency table, total frequency equals:
Number of categories
Sum of all frequencies
Highest frequency
Average frequency
Explanation: Total frequency is the sum of all individual frequencies
Question 8 of 10
Which stem would contain the number 47 in a stem-and-leaf plot?
4
7
47
0
Explanation: Stem is the tens digit: 4; leaf is ones digit: 7
Question 9 of 10
A bar graph has gaps between bars because it shows:
Continuous data
Categorical data
Time series data
Random data
Explanation: Gaps indicate separate categories, not continuous data
Question 10 of 10
Tally marks
Explanation: