Question
Researchers with Oceana, a group dedicated to preserving the ocean ecosystem, reported finding that 33% of fish sold in retail outlets, grocery stores, and sushi
Researchers with Oceana, a group dedicated to preserving the ocean ecosystem, reported
finding that 33% of fish sold in retail outlets, grocery stores, and sushi bars throughou
the United States had been mislabeled (San Francisco Chronicle website, February 21.
2013). Does this mislabeling differ for different species of fish? The following data show
the number labeled incorrectly for samples of tuna and mahi mahi.
Tuna
Mahi Mahi
Sample
Mislabeled
220
99
160
56
What is the point estimate of the proportion of tuna that is mislabeled?
What is the point estimate of the proportion of mahi mahi that is mislabeled?
Provide a 95% confidence interval estimate of the difference between the proportion
of tuna and mahi mahi that is mislabeled.
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