1.1 Descriptive & Inferential Statistics

Front

A group of subjects selected from a population is a _________________

Back

sample

Front

Tell if the statement is descriptive or inferential: A recent survey of 2000 adults having an MBA reported that the average salary is more than $65,000 a year.

Back

Descriptive

Front

Variables whose values are determined by chance are called ______________ variables.

Back

random

Front

_____________________ statistics consists of generalizing from samples to populations, performing estimations and hypothesis tests, determining relationships among variables, and making predictions.

Back

Inferential

Front

Tell if the statement is descriptive or inferential: The senior citizens that live in Florida have better memories than the ones that live in Texas.

Back

Inferential

Front

What is the primary purpose of descriptive statistics?

Back

To summarize and describe the main features of a dataset.

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 a hypothesis test in inferential statistics?

Back

A method used to determine if there is enough evidence to reject a null hypothesis.

Front

What does it mean if a variable is considered 'random'?

Back

Its value is subject to chance and cannot be predicted with certainty.

Front

What is the role of estimations in inferential statistics?

Back

To make educated guesses about population parameters based on sample statistics.