13.7 Histograms SWBAT make and read a histogram SWBAT locate the quartiles of a set of data on a histogram SWBAT interpret a frequency polygon.

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Presentation transcript:

13.7 Histograms SWBAT make and read a histogram SWBAT locate the quartiles of a set of data on a histogram SWBAT interpret a frequency polygon

Vocabulary Histogram- a bar graph that shows the frequency of equal intervals of data There are no spaces between the bars unless there is an interval with a frequency of 0 Frequency polygon- made up by connecting the midpoints of the tops of all of the bars of the histogram Shows the rate at which the frequencies vary

How to make a histogram Make a frequency table for the data Decide on a number of intervals that include all values Draw and label the horizontal and vertical axes Use the intervals in order on the horizontal axis Use the frequencies starting at 0, on the vertical axis Construct bars to show the frequency of each interval Write a title for the histogram

Make a histogram for each set of data Temperature (F)Frequency

Make a frequency table and histogram

Frequency table and histogram with frequency polygon

Using the frequency table and histogram answer the following questions Which value is the median? What interval contains the median? Locate the quartiles on the histogram Using the histogram, what conclusions can you draw about the data? Using the frequency polygon, what other conclusions can you make?