Homework out

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# Homework out - PowerPoint PPT Presentation

Homework out. Warm-up What type of functions are each of these? .75 x 3x 2 – 2 3x - .75. Mean, median, mode, range. Mean: the average of a set of data. Add all numbers in the data set &amp; divide by the total # Median: The middle # of the data set.

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### Homework out

Warm-up

What type of functions are each of these?

.75x

3x2 – 2

3x - .75

Mean, median, mode, range
• Mean: the average of a set of data.
• Add all numbers in the data set & divide by the total #
• Median: The middle # of the data set.
• Order all the numbers from least to greatest. Find the middle #.
• If there are two middle numbers, find the average of the two middle numbers.
• Mode: The # that occurs the most often in a data set.
• Range: the difference between the smallest & largest # in the data set.
find the mean, median, mode, & range

9, 5, 8, 5, 9, 8, 4, 8, 7

Mean = 7

Median = 8

Mode = 8

Range = 5

Box & whisker plots

A graph that displays the highest & lowest quarters of data as whiskers, the middle two quarters of the data as a box, & the median.

Quartiles: Each quarter of the graph which represents ¼ or 25% of the data.

To draw a box & whisker plot
• Order numbers in the data set from least to greatest
• Find the median of the entire data set
• The median of the entire data set is called the 2nd quartile in a box & whisker plot
• Find the median of the lower half of the data set
• The median of the lower half of the data set is called the 1st quartile
• Find the median of the upper half of the data set
• The median of the upper half of the data set is called the 3rd quartile
• Draw a box connecting the 1st, 2nd, & 3rd quartiles
• Draw whiskers from the box to the lowest & highest numbers in the data set.
Draw a box & whisker plot

See pg. 32 in pre-alg workbook

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