Descriptive Statistics Lecture

This collection of flashcards covers key vocabulary and concepts from descriptive statistics, helping students review definitions and their significance.

Descriptive Statistics

Statistics that summarize characteristics of a population or sample.

Inferential Statistics

Statistics that make inferences from a sample to the population.

Frequencies

Counts of occurrences of values in a dataset.

Cross-Tabs

A method for observing the relationship between two categorical variables.

Central Tendency

A measure that determines a central or average value.

Dispersion

The extent to which a distribution is stretched or squeezed.

Variance

A measure of the spread between numbers in a dataset.

Standard Deviation

A statistic that quantifies the amount of variation or dispersion in a set of values.

Coefficient of Variation

A relative measure of dispersion expressed as a percentage.

Skewness

The measure of the asymmetry of the probability distribution of a real-valued random variable.

Kurtosis

A descriptor of the shape of the distribution's tails in relation to its overall shape.

Frequency Polygon

A continuous line representing the frequencies of scores within class intervals.

Histogram

A graphical representation of the distribution of numerical data.

Mode

The value that appears most frequently in a data set.

Median

The middle value in a data set when it is ordered.

Mean

The average of a set of values, calculated by taking the sum and dividing by the number of values.

Outliers

Values that are significantly higher or lower than the rest of the data.

Inter-Quartile Range (IQR)

A measure of statistical dispersion representing the difference between the upper and lower quartiles.

Platykurtic

A distribution with flat tails, implying a lower peak.

Mesokurtic

A distribution with tails similar to a normal distribution.

Leptokurtic

A distribution with heavy tails, indicating a sharper peak.