Term
|
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
|
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
|
Definition
Alpha is probability-defines unlikely outcomes based on random variability.
p<.05: statistically significant, evidence is sufficient to reject the null. |
|
|
Term
|
Definition
Mean of all sample means.
Calculated by taking sum of all sample means and dividing by # of samples. |
|
|
