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Question 3 (4 marks) Part a) Given the following information X-500, σ=12, n=50 i) Determine the 95% confidence interval estimate of population mean. ii) Determine the 99% o confidence interval estimate of population mean Part b) A statistics practitioner calculated the mean and standard deviation from a sample of 51. They are X-120 and s-15. (i) Estimate the population mean with 95% confidence level (ii) Estimate the population mean with 99% confidence level.

Please give the text answer do not with hand writing, Thanks

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past (a) population man. hona o,os using cxHti (al Value taba aad rgmal E 3.336a X-E500- 3.3496 6130 XE 500 3.32 503.32 o-o.ol E5139 -E500 4 34 495. 630 RHE- SGO t 4.3679= Sur, 3699 4%-63g 504-3691)Fat(b LİO NON ue halets 솎rd.qqy. (arfdeni, in aid E 5.6949

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