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Q4.(15) A random sample of the height of apple tree was recorded. 11.3,11.7,10.7,12.2,12.8,13.5 11.3 , 11.7...

Q4.(15) A random sample of the height of apple tree was recorded. 11.3,11.7,10.7,12.2,12.8,13.5 11.3 , 11.7 , 10.7 , 12.2 , 12.8 , 13.5 . 1.(5) Apply the backward empirical rule to check normality of the data, and conclude if any evidence of non-normality. 2.(5) Assume the height of the apple is normal, calculate the 95% 95 % two-sided confidence interval for the true population average height. 3.(5) Assume that population variance ?2=1.32 σ 2 = 1.3 2 and the bound on the error of estimation of 95% 95 % confident interval to be 1 1 . Find the minimum sample size ? n .

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