Term 1 mixed review for fun (Stats)

Front

What should a residual plot look like?

Back

Random with no pattern.

Front

What mountain chain can be found in the western US?

Back

The Rockies.

Front

Identify the sampling method: At a local community College, five math classes are randomly selected out of 20 and all of the students from each class are interviewed.

Back

Cluster.

Front

Explain the difference between random sampling and stratified sampling.

Back

Random sampling selects individuals randomly from the entire population, while stratified sampling divides the population into subgroups and then randomly selects individuals from each subgroup.

Front

What is the flag of Morocco?

Back

The flag of Morocco features a red field with a green pentagram (five-pointed star) in the center.

Front

Define random sampling.

Back

Random sampling is a technique where each member of a population has an equal chance of being selected.

Front

Define stratified sampling.

Back

Stratified sampling is a method where the population is divided into subgroups, and random samples are taken from each subgroup.

Front

What is a residual plot used for?

Back

A residual plot is used to assess the fit of a regression model by plotting residuals on the vertical axis and fitted values on the horizontal axis.

Front

What does a random residual plot indicate?

Back

A random residual plot indicates that the model is a good fit for the data.

Front

What is the purpose of sampling in statistics?

Back

The purpose of sampling is to make inferences about a population based on a subset of data.