The standard deviation of a variable is 15. If a sample of 100 individuals is selected, 1. Find the standard error of the mean. Round the answer to three decimal places. 2. Find the sample size needed to cut the standard error of the mean in half. Round intermediate calculations to three decimal places and round your final answer up to the nearest whole number .
Added by Theodore B.
Step 1
Given that the standard deviation is 15 and the sample size is 100, we can calculate the standard error of the mean using the formula: Standard Error = Standard Deviation / √(Sample Size) Standard Error = 15 / √100 Standard Error = 15 / 10 Standard Error = 1.5 Show more…
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