Statistics - Review

Front

What is a histogram?

Back

A graph showing the frequency of data within equal intervals.

Front

What is the probability of obtaining a head when a certain coin is flipped?

Back

0.65

Front

What does a correlation coefficient of r = -1 indicate?

Back

A perfect negative linear relationship between two variables.

Front

What is stratified sampling?

Back

A sampling method where the population is divided into subgroups (strata) and random samples are taken from each stratum.

Front

What is the mode of a data set?

Back

The value that appears most frequently in a data set.

Front

How do you calculate the mean of a data set?

Back

Add all the numbers together and divide by the count of numbers.

Front

What is a scatterplot?

Back

A graph that uses dots to represent the values obtained for two different variables.

Front

What does a correlation coefficient of r = 1 indicate?

Back

A perfect positive linear relationship between two variables.

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize data, while inferential statistics make predictions or inferences about a population based on a sample.

Front

What is a sample in statistics?

Back

A subset of a population used to represent the whole population.