In a recent issue of Consumer Reports , Consumers Unionreported on their investi

Question

In a recent issue of Consumer Reports, Consumers Unionreported on their investigation of bacterial contamination inpackages of name brand chicken sold in supermarkets.

Packages of Tyson and Perdue chicken werepurchased. Laboratory tests found campylobacter contamination in 35of the 75 Tyson packages and 22 of the 75 Perduepackages.

The 95% confidence intervals for the proportionof Tyson packages with contamination is (.345 ,.580) and the proportion of Perdue packages withcontamination (.190, .396). What does this suggest about thedifference in the proportionof Tyson and Perdue packagesthat have bacterial contamination (chooseone)?

    a.) The overlap suggests that there is nosignificant difference in the proportions of packagesof Tyson and Perdue chickenwith bacterial contamination.

   b.) Even though there isoverlap, Tyson's sample proportion is higherthan Perdue's soclearly Tyson has the greater true proportion ofcontaminated chicken

Explanation / Answer

Answer: b.) Even though there isoverlap, Tyson's sample proportion is higherthan Perdue's soclearly Tyson has the greater true proportion ofcontaminated chicken

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