Statistics Midterm Vocab

A person observes and measures a characteristic without changing the conditions.

Is replicating the experiment by using a large number of subjects.

Consists of the smallest data value, Quartile 1, the median, quartile 3, and the largest data value.

Is the difference between the data value and the mean of the data set.

The difference between the maximum and minimum numbers (max-min).

It consists of a single outcome.

Is quantitative only; similar to interval level except 0 (zero) is inherent

Two events are considered this if they cannot occur at the same time.

Is the collection of all outcomes, responses, measurements, or counts.

Is an unmedicated treatment made to look like the real treatment.

Are used to list the sample space of actions that happen in sequence.

Is data that can be considered attributes, labels, or non-numerical.

Is the science that consists of collecting, organizing, analyzing, and interpreting data.

Based on probabilities obtained from probability experiments.

Is a branch of statistics that draws conclusions about a population based on the results of a sample.

If an experiment is repeated over and over it approaches the theoretical probability.

When outcomes in a sample space are equally likely to occur. 

Is for data that is symmetric and bell-shaped (AKA. The 68%, 95%, 99.7% Rule).

The average of your data set.

Is data that is numerical (can be measured or counted).

Occurs when one outcome is favored over another.

The factor that is manipulated by the experimenter, the combination of factor levels are called treatments.

The number that occurs the most in your data set.

Is qualitative only; categorized using names, labels, or qualities.

A table that shows classes (intervals of data) and counts.

 Is the collection of a subset of a population.

A group of objects in which order does not matter.

Is the square root of the population variance.

Is qualitative or quantitative; data can be arranged in order or rank (differences between data are not useful)

Using a mathematical or physical model to reproduce the conditions of a study.

A group which no treatment is applied and is used for comparison.

An arrangement or line up of objects in which order matters

It is a graphical display of the 5-number summary (Min, Q1, Median, Q3, Max).

Is a data value that is far away from the other data values.

Is when you add up all of the squares of the deviations and find the mean of the squared deviations.

It is the list of all possible outcomes of a probability experiment.

Is a number that describes a characteristic of a whole population.

A treatment is imposed upon a subject and a response is recorded.

A rule that can be applied to any events that occur in sequence.

Is a number that describes a characteristic of a sample.

Is quantitative only; can be ordered and calculating differences can be useful (zero represents a position on a scale).

Is the information gathered from observations, surveys, and experiments (counts, measurements, or responses).

Is a branch of statistics that organizes, summarizes, and displays data.

Is randomly assigning subjects to different treatment groups.

The middle of your data set.

A trial in which count, measurements, or responses are obtained.

It represents the number of standard deviations a value is from the mean.

Is used to investigate one or more characteristics of a population by asking subjects questions.

The difference between the 3rd and 1st quartile (Q3-Q1).