Lesson Topic: Describing a Distribution Displayed in a Histogram Lesson Objective: I can…  I can construct a relative frequency histogram.  I can recognize.

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Presentation transcript:

Lesson Topic: Describing a Distribution Displayed in a Histogram Lesson Objective: I can…  I can construct a relative frequency histogram.  I can recognize that the shape of a histogram does not change when relative frequency is used compared to when frequency is used to construct the histogram.

Relative frequency…  Is the value of the frequency in an interval divided by the total number of data values, written as a decimal rounded to the nearest thousandth.  Converting the decimal to a percent helps to interpret the value

 How do you find the total number of data values?  What will the sum of the relative frequency column equal?

Example 1

Example 1, continued…  Which interval has the greatest relative frequency? What is the value?  What percent of the head circumferences is between 530 and 589?

Example 2

Example 2, Continued - Frequency histogram vs. relative frequency histogram Similarities & Differences - Center? Shape? Intervals? Labeling of the axes? Scaling of the axes?

Example 2, Continued…  What is the relative frequency for the large hat sizes? What does this number mean?  Isabel said that most of the hats that needed to be ordered were small, medium, and large. Was she right? What percent of the hats to be ordered is small, medium, or large?

Exercises

Exercises, continued…  Construct a relative frequency histogram.  What percent of the arenas has a seating capacity between 18,500 and 19,999 seats?

Evaluate Your Learning How will you “Sharpen Your Saw”?