# One institute mandates that for every 100 items scanned through the electronic checkout scanner at a retail store no more than 2 should have an inaccurate price

Stat230 Group Exercises Week 2 Directions: Please complete each of the 3 problems and submit to this folder 1. One institute mandates that for every 100 items scanned through the electronic checkout scanner at a retail store no more than 2 should have an inaccurate price. A recent study of the accuracy of checkout scanners at the stores of a certain company showed that of the 55 company stores investigated 41 violated the institute’s scanner accuracy standard. If 1 of the 55 company stores is randomly selected what is the probability that that store does not violate the institute scanner accuracy standard? 2. The table to the right Jury Judge Totals gives a breakdown of Plaintiff trialwin – reversed 198 71 269 2 137 civil cases that Plaintiff trial were appealed. The win-affirmed/dismissed 415 242 657 outcome of the Defendant trial win – reversed 118 65 183 appeal, as well as the Defendant trial type of trial (judge or win -affirmed/dismissed 713 315 1 028 jury), was determined Totals 1 444 693 2 137 for each case. Suppose one of the cases is selected at random and the outcome of the appeal and type of trial are observed. .gif”> · a.Find P(A) where A= {jury trial} · Find P(B) where B = {defendant trial win is reversed} · Are A and B mutually exclusive events? · Find P(Ac) · Find (A? B) · Find (A? B) 3. P(Dc) · · P(Bc) · P(B? D)

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