Review - Unit 1: Descriptive and Inferential Statistics

Front

What is the highest score on the math test?

Back

97

Front

What does random assignment of treatments reduce?

Back

Bias

Front

In a dataset with a mean of 50 and a standard deviation of 10, what is the z-score for a value of 65?

Back

1.5

Front

List three data collection methods commonly used in statistics.

Back

Surveys, Observational Studies, Experiments

Front

What is the purpose of randomization in a study?

Back

To reduce bias and create comparable groups.

Front

Define descriptive statistics.

Back

Descriptive statistics summarize and describe the characteristics of a dataset.

Front

Define inferential statistics.

Back

Inferential statistics use a random sample of data to make inferences about a population.

Front

What is a z-score?

Back

A z-score indicates how many standard deviations an element is from the mean.

Front

What is the difference between a population and a sample?

Back

A population includes all members of a specified group, while a sample is a subset of the population.

Front

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

Back

To provide a baseline for comparison against the treatment group.