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3 cards from this section. Quick, good the night before a test.
What are tally marks used for?
Think about how we visually represent numbers.
Which interval does the number 25 fall into?
Look for the range that includes 25.
What is the main purpose of classification in data analysis?
Think about the reason why we sort numbers.
What is a tally mark?
Do you remember how we represent counts visually?
Given a dataset containing: 12, 22, 22, 36, 47, 50, and 68, classify the data points, draw tally marks for each interval, and compute the total frequency.
Use the class intervals carefully while classifying.
If a study shows frequencies of: 0-10: 3, 10-20: 5, and 20-30: 4, what classifications would change if 2 more numbers are added to the 10-20 group?
Focus on how new data affects the existing count.
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