Chapter 1

Determine whether the data described below are qualitative or quantitative and explain why.
The types of movies (drama, comedy, etc.)

• The data are qualitative because they consist of counts or measurements.
• The data are quantitative because they consist of counts or measurements.
• The data are qualitative because they don’t measure or count anything.
• The data are quantitative because they don’t measure or count anything.

Determine whether the given value is a statistic or a parameter.
A homeowner measured the voltage supplied to his home on 42 random days, and the average (mean) value is 127.1 volts.

• The given value is a statistic for the year because the data collected represented a population.
• The given value is a parameter for the year because the data collected represent a sample.
• The given value is a parameter for the year because the data collected represent a population.
• The given value is a statistic for the year because the data collected represent a sample.

Determine whether the data described below are qualitative or quantitative and explain why.
The area codes (such as 617) of the telephones of survey respondents.

• The data are quantitative because they consist of counts or measurements.
• The data are quantitative because they don’t measure or count anything.
• The data are qualitative because they consist of counts or measurements.
• The data are qualitative because they don’t measure or count anything.

State whether the data described below are discrete or continuous, and explain why.
The distances between different cities in a certain country.

• The data are continuous because the data can take on any value in an interval
• The data are discrete because the data can take on any value in an interval.
• The data are continuous because the data can only take on specific values.
• The data are discrete because the data can only take on specific values.

5. State whether the data described below are discrete or continuous, and explain why.

The numbers of teeth that different animals have.

• The data are continuous because the data can only take on specific values.

• The data are discrete because the data can only take on specific values.

• The data are continuous because the data can take on any value in an interval.

• The data are discrete because the data can take on any value in an interval.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.
The rankings of songs in the top 100.

• Ordinal.
• Ratio.
• Interval.
• Nominal.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.
Monthly rainfall: 3.4 in, 3.5 in, 3.6 in, 3.7 in, and 3.8 in.

• Ordinal.
• Ratio.
• Interval.
• Nominal.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate
Flight numbers

• Ordinal.
• Ratio.
• Interval.
• Nominal.