Homework: HW Section 7-2 Estimating a Population Mean Save 2 of 10 (2 complete)
ID: 3072420 • Letter: H
Question
Homework: HW Section 7-2 Estimating a Population Mean Save 2 of 10 (2 complete) v Score: 0 of 1 pt Hw Score: 1096, 1 of 10 pts 7.2.19-T Question Help A food safety guideline is that the mercury in fish should be below 1 part per milion (ppm). Listed below are the amounts of mercury (ppm) found in tuna sushi sampled at there is too much mercury in tuna sushi? stores in a major city. Construct a 95% confidence interval estimate of the mean amount of mercury in the population. Does it a 0.54 0.72 0.11 0.98 1.36 0.52 0.87 o What is the confidence interval estimate of the population mean ? Round to three decimal places as needed.) Enter your answer in the edit fields and then click Check Answer part All F11Explanation / Answer
Ans:
n=7
df=7-1=6
Sample mean=0.729
sample standard deviation,s=0.397
critical t value=tinv(0.05,6)=2.447
95% confidence interval for population mean
=0.729+/-2.447*(0.397/sqrt(7))
=0.729+/-0.367
=(0.362, 1.095)
As,upper limit is higher than 1 ppm,so there is too much mercury.
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