Problem set#6-1

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Temple University *

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3409

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Statistics

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Jan 9, 2024

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docx

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Uploaded by SuperHumanSummer120

Criminal Justice Statistics WORKSHEET FOR PROBLEM SET #6 QUESTION 1 Relying on your frequency table, use the restricted addition rule to calculate the following probabilities: Statistics Variable indicating the assailant's relationship to the victim N Valid 1387 Missing 44 Mean 1.6864 Std. Error of Mean .03369 Median 2.0000 Mode 3.00 Std. Deviation 1.25488 Variance 1.575 Skewness -.277 Std. Error of Skewness .066 Range 3.00 Minimum .00 Maximum 3.00 Sum 2339.00 Percentiles 25 .0000 50 2.0000 75 3.0000 Variable indicating the assailant's relationship to the victim Frequency Percent Valid Percent Cumulative Percent Valid stranger 403 28.2 29.1 29.1 slightly known 168 11.7 12.1 41.2 casual acquaint 277 19.4 20.0 61.1 well known 539 37.7 38.9 100.0 Total 1387 96.9 100.0 Missing Don't know 9 .6 System 35 2.4
Total 44 3.1 Total 1431 100.0 Probabilities PR(Stranger) N=1387 Stranger(n)=403 PR (stranger)=403/1387 Ans= (0.29) PR (Well Known) Well known(n)=539 PR (Well known) =539/1387 Ans=49/127(0.39) PR (Slightly Known, Casual Acquaintance, OR Well Known) Slightly known=168 Casual=277 Well known=539 PR= (168+277+539)/1387 Ans=(0.71) Use the probabilities you calculated to calculate the odds of each event occurring. Odds Stranger =PR(S)/(1-pr(S) =0.29/ (1-0.29) Ans=(0.41) Well Known =PR(W)/(1-pr(W) =0.39/ (1-0.39) Ans=(0.64) Slightly Known, Casual Acquaintance, OR Well Known PR (SK, CA, W)/ (1- SK, CA, W) =0.71/ (1-0.71) Ans=2.45 Now write a sentence or two answering the following question: DO victims know their assailants, or is it mostly strangers? Based on the probabilities provided, it is more likely that victims know their assailants than not. The probability of a victim being assaulted by a well-known assailant is higher (0.39) than the probability of being assaulted by a stranger (0.29).
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