Question: b) Construct a 96% Confidence Interval for the mean systolic blood pressure of female high- jumpers using a sample of 94. The sample average

b) Construct a 96% Confidence Interval for the mean systolic blood pressure

b) Construct a 96% Confidence Interval for the mean systolic blood pressure of female high- jumpers using a sample of 94. The sample average is 114.3, and the sample standard deviation is 4.9 (with 4 digits after the decimal point). Answer: The interval is between and c) Construct a 99% Confidence Interval for the proportion of blood type O among female 400m-runners using a sample of 112, where 38 among them have this blood type (with 4 digits after the decimal point). Answer: The interval is between and d) What must the sample size be so that the 98% confidence interval for the proportion of left-handers in Nigeria, that is to be calculated, is not longer than 3%? (i.e. its total width is 3%).

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