AP Stats Interpretations 1-4 Units

Standard Deviation

The context typically varies by SD from the mead of value.

Percentile

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

Z-Score

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

Describe a distribution

SOCV! Shape, Outliers, Center, Variability

Correlation (r)

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

Residual

The actual y-context was residual value 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

The actual y-context is typically SD 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.

Describe the relationship

DUFS-The scatterplot reveals a strong/moderate/weak, positive/negative, linear/nonlinear association between x-context and y-context. Possible outliers (state it as coordinates).

Probability

After many, many context, the proportion of times that context A will is about P(A).

Conditional Probability

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