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2061_10%20Day%208_Variance%20and%20standard%20deviation%20BB-1

# 2061_10%20Day%208_Variance%20and%20standard%20deviation%20BB-1

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Click to edit Master subtitle style 2/24/10 Day 8: Variance and standard deviation From Day 7: I QR and Box Plot Variance Standard Deviation Choosing a measure of variation

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2/24/10 The difference between the Range and IQR Shows greater variability These values fall together closely Yet the ranges are equal! I mportance of the I QR
2/24/10 Calculate the range and IQR Hours of weekly homework Group 1 Group 2 0 5 10 1 15 10 2 40 30 3 20 5 4 10 5 5 5 10 6 10 7 5 8 5 9 5 10 5 5

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2/24/10 The Box Plot The Box Plot is a graphic device that visually presents the following elements: the range , the IQR , the median , the quartiles , the minimum (lowest value,) and the maximum (highest value.) M a x i m u m Q 3 Q 1 M e d i a n M i n i m u m R a n g e I Q R
2/24/10 Variance and standard deviation § Measures that look at the average distance to the mean § Variance and s.d. are similar measures; s.d. is simply the square root of the variance. The standard deviation is more meaningful.

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2061_10%20Day%208_Variance%20and%20standard%20deviation%20BB-1

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