QUESTION 1 (a) The concentration of chlorine in swimming pool is vary with a standard deviation of 14.1 ppm (part per mi

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Question 1 A The Concentration Of Chlorine In Swimming Pool Is Vary With A Standard Deviation Of 14 1 Ppm Part Per Mi 1 (22.51 KiB) Viewed 90 times

QUESTION 1 (a) The concentration of chlorine in swimming pool is vary with a standard deviation of 14.1 ppm (part per million) for swimming pool A and 9.5 ppm for swimming pool B. Random samples of 75 chlorine readings in swimming pool A and 50 chlorine readings in swimming pool B yield means of 28 and 33 ppm, respectively. i Construct a 97.5% confidence interval of the difference in true means concentration of chlorine between these two swimming pool. ii. A chemist wants to check whether the true means concentration of chlorine are same for swimming pool A and B. At 7% significance level, could you assist the chemist?