A sample of n = 25 scores has a mean of m = 68. Find the Z score for this sample: A) If it was obtained from a population with μ = 60 and σ = 10 Z = ___ B) If it was obtained from a population with μ = 60 and σ = 20 Z = __ C) If it was obtained from a population with μ = 60 and σ = 40 Z = __
Added by Robert C.
Step 1
The formula for standard error is: SE = \frac{\sigma}{\sqrt{n}} where \sigma is the population standard deviation and n is the sample size. A) SE = \frac{10}{\sqrt{25}} = \frac{10}{5} = 2 B) SE = \frac{20}{\sqrt{25}} = \frac{20}{5} = 4 C) SE = Show more…
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