Unit 1: One Variable Data Flashcards

Flashcards covering key vocabulary and concepts from Unit 1 on One Variable Data.

Distribution

Shows possible values and the frequency of each value or interval.

SOCS/CUSS

Shape, Outliers/Gaps, Center, Spread, unusual features, and Context.

Skewed Right

A distribution where the tail extends to the right.

Skewed Left

A distribution where the tail extends to the left.

Unimodal

Having one peak in a distribution.

Bimodal

Having two peaks in a distribution.

Multimodal

Having multiple peaks in a distribution.

Outliers

Values that lie far from the rest of the data.

Gaps

Gaps in data distribution.

Uniform

A distribution where all values occur with approximately equal frequency.

Bell Curve/Normal

A symmetrical, bell-shaped distribution.

Center

The 'typical value' of a dataset.

Mean

The average value in a dataset.

Median

The middle value in a dataset.

Histogram

A graph showing the distribution of numerical data.

Boxplot

A visual representation of data, showing the median, quartiles, and outliers.

Data Set/Stem Plot

A method of displaying data that shows the distribution and preserves individual data values.

Spread/Variability

How spread out the data is.

Range

The difference between the maximum and minimum values in a dataset; sensitive to extreme outliers.

IQR (Interquartile Range)

The difference between the third quartile (Q3) and the first quartile (Q1); resistant to extremes.

Standard Deviation

How much each data value deviates from the mean on average.

Variance

The square of the standard deviation.

Percentile

The percentage of data values below a given value.

Z-Score (Standardized Value)

A measure of the distance from the mean in standard deviations.

Normal Models

Symmetric, unimodal distributions.