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

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

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Unformatted text preview: Click to edit Master subtitle style 2/24/10 Day 8: Var iance and standar d deviation Fr om Day 7: I QR and Box Plot Var iance Standar d Deviation Choosing a measur e of var iation 2/24/10 The differ ence between the Shows greater variability These values fall together closely Yet the ranges are equal! I mpor tance of the I QR 2/24/10 Calculate the range and IQR Hours of weekly homework Group 1 Group 2 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 2/24/10 The Box Plot The Box Plot is a gr aphic device that visually presents the following elements: the r ange , the I QR , the median , the quar tiles , the minimum (lowest value,) and the maximum (highest value.) Ma ximum Q3 Q1 Me dian Mi nimum Rang e IQR 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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This note was uploaded on 02/23/2010 for the course SOCY 2061 taught by Professor Johnson,aa during the Spring '07 term at Colorado.

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

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