Unit 6 Statistics Review

Front

What is standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

What does it mean to be 1 standard deviation to the right of the mean?

Back

It refers to a value that is one standard deviation above the average of a data set.

Front

In a normal distribution, what percent of data falls within 1 standard deviation of the mean?

Back

Approximately 68%.

Front

What is the mean gestation period of the elephant species mentioned?

Back

525 days.

Front

What is the standard deviation of the elephant gestation period?

Back

32 days.

Front

What percent of elephant pregnancies last less than 493 days?

Back

16%.

Front

What type of study is conducted when a researcher manipulates a variable to observe its effect?

Back

Experiment.

Front

What is the purpose of a control group in an experiment?

Back

To provide a baseline for comparison against the experimental group.

Front

What is a survey in research?

Back

A method of gathering information from individuals, often through questionnaires.

Front

What is the empirical rule in statistics?

Back

A rule stating that for a normal distribution, approximately 68% of data falls within 1 standard deviation, 95% within 2, and 99.7% within 3.