Grade 8 Math: Identifying Outliers
This worksheet helps 8th-grade students practice identifying outliers in data sets and understanding their impact on measures of central tendency.
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Grade 8 Math: Identifying Outliers
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Read each question carefully and follow the instructions to identify outliers and analyze data sets. Show all your work where space is provided.
What is an Outlier?
An outlier is a data point that is significantly different from other data points in a set. It can be much higher or much lower than the rest of the data. Outliers can affect the mean, median, and mode of a data set.
1. An outlier is a data point that is different from other data points in a set.
2. Outliers can affect the mean, median, and of a data set.
3. Which of the following data sets most likely contains an outlier?
{10, 12, 11, 13, 10}
{5, 6, 7, 8, 50}
{1, 2, 3, 4, 5}
{100, 101, 102, 103}
4. Identify the outlier in the following data set: {15, 18, 16, 12, 90, 14, 17}
5. Consider the data set: {5, 7, 8, 6, 9}. Calculate the mean. Then, add an outlier (e.g., 100) to the data set and recalculate the mean. How does the outlier affect the mean?
6. Plot the following data points on the number line and circle any potential outliers: {10, 15, 12, 11, 40, 13, 14}