Unit 2 Exam (Variables Summaries & Univariate Stats)

What are measusres/behaviors for which all participants have the smae value?

Constant

What are measures or behaviors for which the set of participants have at least two different values?

variable

__ variables are those for which different values indicate different kinds

qualitative

__ variables are those for which different values indicate different amounts

quantitative

What type of statistic involve summaries of a single variable?

Univariate

What type of statistic summarizes the relationship between two variables?

Bivariate

The mean, SD, and skewness are what type of statistics?

Univariate

Correlation, Chi-square, and ANOVA are what type of statistics?

Bivariate

What part of the distribution does the mean describe?

The center

The SD describes what of the distribution?

its variability

The skewness describes what of the distribution?

its shape

What is the balancing part of the distribution?

The mean

What has 50% of the scores above and below it?

the median

What is the mode?

the most common score

What is the average value?

the mean

What is the middlemost value called?

the median

What can be used with both quantitative and qualitative variables?

Mode

Which two can only be used with quantitative varaibles?

Mean and Median

What measures the spread of scores around the mean?

SD

What measures the extent of asymmetry of the distribution?

skewness

What estimates the variability of scores around the population mean?

SD

What estimates the variability of repeated estimates of the population mean around the population mean?

skewness

The accuracy with which sample means represent the population mean is estimated by what?

standard error

The standard error is calculated from what?

the standard deviation & the sample size