# Shared Flashcard Set

## Details

Statistics
Test #3
6
Mathematics
03/27/2013

Term
 Standard Error of Mean
Definition
 Measures the typical distance between sample and population mean.Conceptually similar to SD.SD deals with individual x and SEM deals with sample means.
Term
 Why Real Limits?
Definition
 Individual x scores take up space under the curve.2 vertical lines represent real limits of binomial x score when dealing with binomials.Real limits help to find probability and either include or exclude space.
Term
 Distribution of Sample Means
Definition
 Distribution of all possible samples of a given size (n).SD: all samples=same size, same n. All n are equal, samples vary.RD: entirely made up of sample means.
Term
 When is the distribution of sample means normal?
Definition
 When the sample is greater than or equal to 30.If population of individual x scores is normally distributed.
Term
 Alpha
Definition
 Alpha is probability-defines unlikely outcomes based on random variability.p<.05: statistically significant, evidence is sufficient to reject the null.
Term
 Expected Value of Mean
Definition
 Mean of all sample means.Calculated by taking sum of all sample means and dividing by # of samples.
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