Explaining the difference between standard deviation and standard error
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Under what circumstance is a t statistic used instead of a z-score for hypothesis test?
- when o is known
- when o is unknown (this is the one i had chosen)
- when o is small
- when o is large
A sample of n=25 scores has a mean of M= 83 and a standard deviation of s=15. Explain what is measured by the sample standard deviation.
Compute the estimated standard error for the sample mean, and explain what is measured by the standard error.
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Under what circumstance is a t statistic used instead of a z-score for hypothesis test?
- when o is known (I choose this one, I am sure of my answer)
- when o is unknown
- when o is small
- when o is large
A ...
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