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 ​95% confidence interval estimate of the mean amount of mercury in the population. Does it appear that there is too much mercury in tuna​ sushi?

Mercury (ppm)
0.50
0.77
0.09
0.93
1.33
0.59
0.87

What is the confidence interval estimate of the population mean ​?
__ ppm<μ<__ppm
​(Round to three decimal places as​ needed.)