unit 1 ap stats vocab

Values that are category names or group labels. (examples: color, mood, type of music)

Numerical values of a certain quantity. (examples: height, weight, population of a city)

Gives the number of cases falling into each category.

Gives the proportion/percentage of cases falling into each category.

Separates the values roughly in half, it’s in the middle of graphs.

The range of values from smallest to largest.

Natural subgroups that values fall into in a graph.

Holes where no values fall in a graph.

A distribution with one peak.

A distribution with two peaks.

Where the two halves of a graph are mirroring each other.

The graph gets lower on the right side.

The graph gets lower on the left side.

The graph dips on two sides and has a large mound in the middle. Looks like an upside-down “U” and shows that the graph has a normal distribution.

The values are mostly equal/the graph is in a straight line.

A part of a population.

The middle number in a set of numbers in numerical order. It’s also equal to the mean of a normal distribution.

The average of a set of numbers, found by adding all values and dividing by the amount of numbers in the set.

The mean of an entire population.

The mean of a sample.

The difference between the largest and the smallest value.

The difference between the largest and smallest values after removing the lower and upper quartiles.

IQR = Q3 – Q1 / 75th percentile minus 25th percentile.

The typical distance that each value is from the mean.

The average of the squared differences from the mean.

Takes on a countable number of values. There’s gaps between each of the values. (example: the number of times that a runner finished first in a race)

Infinite values with no gaps (example: heights between a group of 10 people)