Background

Thursday, April 16, 2015

Box-and-Whisker Plot














Outliers can be marked with an * instead of being used as the minimum or maximum number. 

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Friday, April 10, 2015

Shape of Distributions

You can use dot plots and histograms to identify shapes of distributions






By recognizing the shape of distribution, you can better choose an appropriate measure of the data. 

Thursday, April 9, 2015

Histograms

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Wednesday, April 8, 2015

Steam-and-Leaf Plot


5, 8, 12, 30, 32, 48, 49

A stem-and-leaf plot uses the digits of data values to organize a data set. Each data value is broken into a stem and a leaf. 
A stem and leaf plot shows how data are distributed. 






Thursday, March 26, 2015

Mean Absolute Deviation - M.A.D.





Finding the Mean Absolute Deviation (MAD)
Step 1: Find the mean of the data.
Step 2: Find the distance between each data value and the mean.
Step 3: Find the sum of the distances in Step 2.
Step 4: Divide the sum in Step 3 by the total number of data values.

 

Tuesday, March 24, 2015

Quartiles and Interquartile Range

  1. Order the Data from least to greatest
  2. Find the median
  3. Split the data in half, lower half and upper half
  4. First Quartile- Find the median of the lower half
  5. Third Quartile - Find the median of the upper half
  6. The interquartile range- Take the third quartile and subtract the first quartile



**Quartiles show the spread of data

Range


Class Song for Range:
Home Home on the Range,
Take the High and subtract the Low
The data is spread 
a variation you see
Now, you are all as smart as me

Team one range: 78-72 = 6
Team two range: 84-67= 17
Team one has a difference of 6 inches between their players.
Team two has a difference of 17 inches between their players.