Answer Happy

I posted a similar question earlier, but because I continue to get wrong answers using the steps provided I am reposting. it tells me to use technology (statcrunch or Ti83/84) to get my answers. That is the hint but it does not tell me how to use either of these to get the correct answers. Will someone please show me how to get correct answers using either of this methods step by step. I have not only attached the question I'm being asked but my hand written work.
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 98% confidence interval estimate of the mean amount of mercury in the population. Does it appear that there is too much mercury in tuna sushi? 0.57 0.71 0.11 0.94 1.32 0.58 0.91 D What is the confidence interval estimate of the population mean μ? 285 ppm << 1.183 ppm (Round to three decimal places as needed.) x
F① = 1.98.02 te=3.143 a 。 ① = .02 =.01 6. 8 F n=7 X=0.7343 S² = 0.142895 N0.142895= S = 37801 31801) = •9343-(3,143) (극복) : 28534 •7343 +(3.143) (3100¹) = 1.1834 -) 1~11)+(1213%