8-20 Quiz - 1.1 and 1.2

Identify the population:

A survey of 500 adults in the U.S. found that 54% drink coffee daily.

• Collection of the 500 adults surveyed

• Collection of all adults in the U.S.

• 54%

• 500

Identify the sample:

The average age of the students in a statistics class is 21 years.

• The average age

• 21%

• Collection of students in Statistics class

• Statistics class

True or false:

The costs of items in a shopper’s grocery cart represent quantitative data.

• True

• False

True or false:

The nationalities listed in recent survey represents quantitative data.

• True

• False

Identify the data set’s level of measurement:

The IQ scores of students in a class.

• Nominal

• Ordinal

• Interval

• Ratio

Identify the data set’s level of measurement:

The nationality of each person on an airplane.

• Nominal

• Ordinal

• Interval

• Ratio

Identify the data set’s level of measurement:

The salaries of nurses at a hospital.

• Nominal

• Ordinal

• Interval

• Ratio

Identify whether the statement describes inferential statistics or descriptive statistics.

From past figures, it is predicted that 39% of the registered voters in California will vote in the June primary.

• Descriptive Statistics

• Inferential Statistics

Is the following question statistical or non statistical?

How many siblings does each Longview student have?

• Statistical Question

• Non Statistical Question

The main purpose of descriptive statistics is to:

• Summarize data in a useful and informative manner.

• Make inferences about a population.

• Determine if the data adequately represents the population.

• Gather or collect data.