STAT 200 Week 5 Homework Problems_With Verified Solutions-GRADED A+

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STAT 200 Week 5 Homework Problems Homework Problems: 1) According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for... identity theft. In that year, Alaska had 321 complaints of identity theft out of 1,432 consumer complaints ("Consumer fraud and," 2008). Does this data provide enough evidence to show that Alaska had a lower proportion of identity theft than 23%? State the random variable, population parameter, and hypotheses. Solution: Random variable: x = number of consumer complaints from identity theft in Alaska Population parameter = proportion of consumer complaints from identity theft in Alaska Hypotheses = Ho : P= 0.23 Ha : P <0.23 2) According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft. In that year, Alaska had 321 complaints of identity theft out of 1,432 consumer complaints ("Consumer fraud and," 2008). Does this data provide enough evidence to show that Alaska had a lower proportion of identity theft than 23%? Test at the 5% level. Solution: x = 321 n = 1432 p = 0.23 a = 0.05 i. State the random variable and the parameter in words. The random variable is given by: x = number of consumer complaints from identity theft in Alaska The parameter of interest is by: p = proportion of complaints from identity theft in Alaska ii. State the null and alternative hypotheses and the level of significance The hypotheses for this experiment are given by: [Show More]

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