
Statistics Refresher Course
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
John Rey Jimenez
Used 1+ times
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70 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following graphs is most appropriate for displaying the distribution of a single quantitative variable?
Pie chart
Bar graph
Histogram
Pareto chart
Answer explanation
Histogram
Explanation: A histogram is specifically used to display the distribution of quantitative data by grouping data into intervals.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A histogram for a dataset is heavily skewed to the right. Which of the following is likely true about the relationship between the mean and median?
Mean < Median
Mean = Median
Mean > Median
Mean is undefined
Answer explanation
Answer: Mean > Median
Explanation: In a right-skewed distribution, the mean is pulled in the direction of the skew, making it greater than the median.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A company wants to compare the number of customer complaints received in four different regions. Which graph is most suitable?
Histogram
Bar chart
Dot plot
Stem-and-leaf plot
Answer explanation
Answer: Bar chart
Explanation: Bar charts are ideal for comparing categorical data, such as regions.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements best distinguishes a histogram from a bar chart?
A histogram can only show categorical data.
A bar chart uses intervals while a histogram does not.
Bars in a histogram are separated while bars in a bar chart are touching.
Bars in a histogram touch, indicating a continuous scale.
Answer explanation
Answer: Bars in a histogram touch, indicating a continuous scale.
Explanation: In histograms, adjacent bars touch to represent continuous intervals; in bar charts, bars are separated to show distinct categories.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Given the following stem-and-leaf plot:
What is the median of the dataset?
55
50
52.5
53.5
Answer explanation
Answer: 52.5
Explanation: The ordered data: 41, 43, 47, 50, 55, 59, 62, 68. The median is the average of the 4th and 5th values: (50+55)/2 = 52.5 → rounded or represented as 52 if using midpoint conventions.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A pie chart shows five categories of expenses. If one category represents 90° of the circle, what percent of the total does it represent?
15%
25%
50%
90%
Answer explanation
Answer: 25%
Explanation: A circle is 360°. 90°/360° = 0.25 = 25%.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mean of the following data set: 4, 8, 6, 10, 12?
6
8
10
12
Answer explanation
Answer: 8
Explanation: Mean = (4+8+6+10+12)/5 = 40/5 = 8.
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