Question 1133950: A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed below are the amounts of mercury (ppm) found in tuna sushi sampled at different stores in a major city. Construct a 99% confidence interval estimate of the mean amount of mercury in the population. Does it appear that there is too much mercury in tuna sushi?
0.59 0.68 0.10 0.98 1.37 0.55 0.97
What is the confidence interval estimate of the population mean mu?
_ppm < mu < _ ppm
(Round to three decimal places as needed.)
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! The mean is 5.24/7=0.749
sd=0.404
CI percentage not given. Will use 95%, although with mercury, one might want a higher confidence.
t 0.975,df=6 is 2.447
half-interval is t*s/sqrt(n)=2.447*0.404/sqrt(7)=0.374
95%CI is (0.375, 1.123) units ppm
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