Using the sample standard deviation of age as an estimate of the population standard deviation, calculate by hand the standard error of the mean. Show your calculations and the answer. Calculate by hand a 95% confidence interval for "Age" based on the sample mean. Age 18 20 21 24 26 29 30 31 32 35 35 36 37 39 40 42 42 42 44 45 46 48 49 50 52 53 54 58 59 61
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Step 1
Calculate the sample mean (x̄): x̄ = (18 + 20 + 21 + 24 + 26 + 29 + 30 + 31 + 32 + 35 + 35 + 36 + 37 + 39 + 40 + 42 + 42 + 42 + 44 + 45 + 46 + 48 + 49 + 50 + 52 + 53 + 54 + 58 + 59 + 61) / 30 x̄ = 1242 / 30 x̄ = 41.4 Show more…
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