Statistics Review Flashcards

Vocabulary flashcards for statistics exam review.

Standard Deviation

The context typically varies by SD from the mean of mean.

Percentile

percentile % of context are less than or equal to value.

z-score

Specific value with context is z-score standard deviations above/below the mean.

Correlation (r)

The linear association between x-context and y-context is weak/moderate/strong (strength) and positive/negative (direction).

Residual

The actual y-context was residual above/below the predicted value when x-context = #.

y-intercept

The predicted y-context when x = 0 context is y-intercept.

Slope

The predicted y-context increases/decreases by slope for each additional x-context.

Standard Deviation of Residuals (s)

The actual y-context is typically about s away from the value predicted by the LSRL.

Coefficient of Determination (r²)

About r²% of the variation in y-context can be explained by the linear relationship with x-context.

Conditional Probability P(A|B)

Given context B, there is a P(A|B) probability of context A.

Expected Value (Mean, M)

If the random process of context is repeated for a very large number of times, the average number of x-context we can expect is expected value.

Binomial Mean (mew x):

After many, many trials the average # of success context out of in is mew x.

Binomial Standard Deviation (ox)

The number of success context out of n typically varies by ox from the mean of mew x.

Standard Deviation of Sample Proportions (op^):

The sample proportion of success context typically varies by op^ from the true proportion of p.

Standard Deviation of Sample Means (ox-bar):

The sample mean amount of x-context typically varies by ox-bar from the true mean of ux.

Confidence level

If we take many, many samples of the same size and calculate a confidence interval for each, about confidence level% of them will capture the true parameter in context

p-value

Assuming Ho in context (Ho), there is a p-value probability of getting the observed result less/greater/more extreme, purely by chance.

Power

If Ha context is true at a specific value there is a power probability the significance test will correctly reject Ha.

Standard Error of the Slope (SEb)

The slope of the sample LSRL for x-context and y-context typically varies from the slope of the population LSRL by about SEb.