Review - Unit 1: Descriptive and Inferential Statistics

Front

What is the primary purpose of converting raw scores to z-scores?

Back

To standardize units for comparison across different datasets.

Front

What is the z-score for a data point that is exactly at the mean of a normal distribution?

Back

0

Front

What does random assignment of treatments reduce?

Back

Bias.

Front

What is a crucial aspect to consider when assessing the statistical measures used in a study?

Back

The appropriateness of the measures for the data type and research questions.

Front

What is sample-to-sample variability in the context of sampling distributions?

Back

The variation in statistics calculated from different samples of the same size from a population.

Front

Define descriptive statistics.

Back

Descriptive statistics summarize and organize data to describe its main features.

Front

What is inferential statistics?

Back

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

Front

What is a population in statistics?

Back

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

Front

What is a sample in statistics?

Back

A sample is a subset of the population used to represent the group.

Front

What is the difference between a parameter and a statistic?

Back

A parameter is a numerical value summarizing a characteristic of a population, while a statistic summarizes a characteristic of a sample.