Statistics Inference of Population Parameters

What is the branch of statistics that involves drawing conclusions about a population based on information contained in a sample taken from that population?

• descriptive statistics

• inferential statistics

• sports statistics

• health statistics

What is a smaller, representative group drawn from a population?

• unit

• sample

• parameter

• statistic

What is the term in statistics for the entire collection or group of individuals being studied?

• population

• sample

• parameter

• statistic

What is the branch of mathematics dealing with the collection, organization, analysis, interpretation and presentation of data?

• Algebra

• Geometry

• Probability

• Statistics

What role do parameters and statistics play in making inferences about a population?

• Parameters describe the sample, while statistics describe the population.

• Parameters describe the population, while statistics describe the sample.

• Parameters and statistics are the same thing.

• Parameters and statistics are not relevant in making inferences about a population.

True or False: all samples lead to a good prediction about an entire population.

• True

• False

What is a characteristic of a sample?

• parameter

• statistic

• categorical variable

• numerical variable

Is the following a parameter or a statistic?

The average annual salary for 35 of a company's 1200 accountants is $68,000.

• parameter

• statistic

Is the following a parameter or a statistic?

In a recent survey of 1503 adults in the United States, 33% said they use both a landline and a cell phone.

• parameter

• statistic

Before a nationwide election, a polling company is trying to predict who will win. Which choice is the best representation of a statistic they may obtain?

• A selection of voters over age 50.

• All voters.

• The percentage of voters in favor of the candidate.

• 53% of a selection of voters support the candidate.