Arsenic-based additives in chicken feed have been banned by the European Union but are mixed in the diet of about 70% of the 9 billion broiler chickens produced annually in the US. Many restaurant and supermarket chains are working to reduce the amount of arsenic in the chicken they sell. To accomplish this one chain plans to measure, for each supplier, the amount of arsenic in a random sample of chickens to see if the mean level of arsenic is above 80 ppb. In a random sample of 45 chickens, the mean arsenic level was found to be 83.5 ppb with a standard deviation of 1.25 ppb. Does this provide evidence that the mean arsenic level is higher than 80 ppb and the chain should not use this supplier? Test at the 5% level of significance. Lets assign numbers to symbols in this matching problem.
Arsenic-based additives in chicken feed have been banned by the European Union but are mixed in the diet of about 70% of the 9 billion broiler chickens produced annually in the US. Many restaurant and supermarket chains are working to reduce the amount of arsenic in the chicken they sell. To accomplish this one chain plans to measure, for each supplier, the amount of arsenic in a random sample of chickens to see if the mean level of arsenic is above 80 ppb.
In a random sample of 45 chickens, the mean arsenic level was found to be 83.5 ppb with a standard deviation of 1.25 ppb.
Does this provide evidence that the mean arsenic level is higher than 80 ppb and the chain should not use this supplier? Test at the 5% level of significance.
Lets assign numbers to symbols in this matching problem.
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