Question

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?

0.55  0.76  0.09  0.88  1.33  0.51  0.85

What is the confidence interval estimate of the population mean μ​?

Answer 1

The Confidence Interval for a single mean is given by

where s is the sample standard deviation

then

then

=3.70

then the confidence interval for is given by

  

  

Since 0 which indicates the statement of no difference or the insignificance ,is not in this interval . Hence we can say that there is a significant amount of mercury in the tuna sushi