Histogram Whiteboard Activity 4.18.12. Is the following a histogram?

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Presentation transcript:

Histogram Whiteboard Activity

Is the following a histogram?

What is wrong with the following histogram?

Answers: No title Unequal intervals Intersecting intervals No labels Gaps between bars

Fix it!

Make a histogram! Before you begin… Ages of students taking Algebra 1: 14, 15, 11, 13, 13, 14, 12, 13, 13, 19, 13, 12, 14, 14, 13, 14, 11, 12, 15, 13 What is the first step?

Make a histogram! Organize your data! Sort the data from least to greatest! 11, 11, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 15, 15, 19 Give the mean, median, and mode. Mean: 13.4, Median: 13, Mode: 13 What is the range? Range: 8

Make a histogram! Organize your data! What’s a good interval to use? Make a frequency table with intervals of 3. Now create a histogram with the above table! AgeTallyFrequency 11-13IIII IIII II IIII II I1

Make a histogram! Your histogram should look like:

Evaluating a histogram What are the intervals for this histogram? 2 How many students studied between 3 and 6 hours? 14 How many students studied for more than 5 hours? 7

Now it’s time for some… COMPETITION!!!

What is wrong with the following histogram?

Evaluating a histogram What are the intervals for this histogram? How much data is less than ??? How much data is between ???

Evaluating a histogram What are the intervals for this histogram? 50 How many colleges got than 450? 43 How many colleges are between 600 and 800? 15

Evaluating a histogram What are the intervals for this histogram? 5 How many families spend less than $30? 35 What is the mode? Not enough information

Time for some… Comparison!

Compare and contrast:

Hot Dogs Eaten in Contest Mode? Median? Make a Line Plot.

Compare and contrast: With… Your Line Plot!

Now it’s time for… …BOOKWORK!