Grade 8 Quantitative Data Analysis Worksheet
This worksheet helps 8th-grade students practice analyzing quantitative data, including measures of central tendency, spread, and data representation.
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Standards
Topics
Grade 8 Quantitative Data Analysis
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all your work for full credit.
1. The following are the scores of 10 students on a recent math test: 85, 92, 78, 88, 95, 80, 90, 75, 88, 92. Calculate the mean, median, and mode for this data set.
Mean:
Median:
Mode:
2. Which of the following measures the spread of the middle 50% of a data set?
Mean Absolute Deviation
Standard Deviation
Interquartile Range
Range
3. Create a box plot for the following data set: 12, 15, 18, 20, 22, 25, 28, 30, 35.
Show your calculations for the five-number summary (minimum, Q1, median, Q3, maximum) below.
Minimum:
Q1:
Median:
Q3:
Maximum:
4. A scatter plot shows the relationship between two variables. If the points generally rise from left to right, it indicates a correlation. If they generally fall from left to right, it indicates a correlation.
5. The bar graph below shows the favorite colors of a group of 8th-grade students. Answer the questions based on the graph.
a. Which color is the most popular among the students?
b. How many students chose Green as their favorite color?
c. What is the difference in popularity between Yellow and Blue?
6. Outliers in a data set can significantly affect the mean.
True
False
7. A histogram is best used to display categorical data.
True
False
8. A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. If you randomly pick one marble, what is the probability of picking a red marble? Express your answer as a fraction and a percentage.
Fraction:
Percentage: