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stat probability project

stat probability project - Statistical Data Set Analysis...

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Statistical Data Set Analysis Project: Weight loss in pounds Kimberly Hargraves STAT 202 Dr. Bao 10/22/10 Part I.

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Weight loss in lbs is nominal level of measurement. A statistical technique was used. The sample set was given to me by my professor Dr. Bao. Frequency distribution table Class Frequency 6-7 6 8-9 7 10-11 9 12-13 6 14-15 2 Frequency Histogram Probability distribution table Class Frequency P(x) 6-7 6 .2 8-9 7 .23 10-11 9 .3 12-13 6 .2 14-15 2 .07 The above probability follows the range of probabilities rule. The probability of an event E is between 0 and 1, inclusive. 0.2+0.23+0.3+0.2+0.07=1. (Larson and Farber 139) The mean of all individual entries are 9.9. The mode is 11. The median is 10. The variance is 5.4. The standard deviation is 2.33. Mean, variance, standard deviation using the frequency distribution table x P(x) xP(x) ( x - u ) (x-u)² P(x)(x-u)² 1 .2 1(.2)=.2 -1.71 2.92 .584 2 .23 2(.23)=.46 -.71 .50 .115 3 .3 3(.3)=.9 .29 .08 .024 4 .2 4(.2)=.8 1.29 1.66 .332
5 .07
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