Final Exam Practice (Stats '24)

Front

What is qualitative data?

Back

Qualitative data refers to non-numerical information that describes characteristics or qualities. Examples include colors, names, and labels.

Front

What is stratified sampling?

Back

Stratified sampling is a method of sampling that involves dividing the population into subgroups (strata) and then taking a fixed number of samples from each subgroup.

Front

Define population in statistics.

Back

A population is the entire group of individuals or instances about whom we hope to learn.

Front

If the average waiting time is 20 minutes with a standard deviation of 4 minutes, how many ticket buyers would expect to wait less than 16 minutes?

Back

320 ticket buyers.

Front

What is quantitative data?

Back

Quantitative data refers to numerical information that can be measured and expressed mathematically. Examples include height, weight, and age.

Front

What is the difference between a sample and a population?

Back

A sample is a subset of a population, selected for the purpose of conducting a study, while a population includes all members of a specified group.

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by dividing the sum of all values by the number of values.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.

Front

What is the purpose of using stratified sampling?

Back

Stratified sampling is used to ensure that specific subgroups are adequately represented in the sample.