PSY 380 X and mean definitions for probability summary

X = u + ZO:

- Equation used to transform z-scores back into X values, for a population

X = M + ZS:

- Equation used to transform Z-scores back into X values, for a sample

Z = X-M / S :

- Formula used to transform X values into Z- Scores, for a sample

Z + X-u / O :

- Formula used to transform X values into Z scores, for a population

Raw Score:

- Original, unchanged datum that is the direct result of measurement

Z-Score:

- Specification of the precise location of each X value within a distribution

Z- Score Transformation:

- Relabeling of X values in a population into precise X- Value Locations within a distribution

Standardized Distribution:

- Composition of data used to make dissimilar distributions comparable

Standardized score:

- Result from relabeling data into new table with positive, whole-number predetermined mean
and standard deviation

Probability:

- Fraction or proportion of all the possible outcomes

Random sampling:

- Selection process wherein each individual in the population has an equal chance of being
selected

Simple Random sample:

- Data set obtained using selection process wherein each individual has equal chance of being
selected