1.3

Which of the following would be classified as categorical data. Amount of rainfall Tree height Number of suitcases on a plane Hair color

Hair color

Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on all 7 days of a given week, and the average (mean) value is 125.8 volts.

The given value is a parameter for the week because the data collected represent a population.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Water temperature in degrees Celsius.

The interval level of measurement is most appropriate because the data can be ordered, differences can be found and are meaningful, and there is no natural starting zero point.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Types of movies ( drama, comedy, adventure, documentary, etc.)

The nominal level of measurement is most appropriate because data cannot be arranged in an ordering scheme.

Determine whether the given value is from a discrete or continuous data set. When a car is randomly selected, it is found to have a tire pressure of 30 psi.

A continuous data set because there are infinitely many possible values and those values cannot be counted.

Determine whether the value given below is from a discrete or continuous data set. In a test of a method of gender selection, 692 couples used the XSORT method and 386 of them had baby girls.

A discrete data set because there are a finite number of possible values.

How do a parameter and a statistic differ?

A parameter is a numerical measurement of a population, a statistic is a numerical measurement of a sample.

Which of the following is associated with a parameter? a. Data that were obtained from a voluntary poll at the end of a service call. b. Data that were obtained from an entire population. c. A numerical measurement describing some characteristic of a sample. d. Data that were obtained from a sample.

B. Data that were obtained from an entire population.

Determine whether the value is from a discrete or continuous data set. Length of rock song is 3.5 minutes. Is the value from a discrete or continuous data set?

Continuous

Which level of measurement consists of categories only where data cannot be arranged in an ordering scheme? Ordinal Interval Nominal Ratio

Nominal

Which of the following consists of discrete data? Hair color Number of suitcases on a plane Tree height Amount of rainfall

Number of suitcases on a plane

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

Ordinal

Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a set of data, alert levels are represented as 0 for low, 1 for medium, and 2 for high. The average (mean) of the 632 alert levels is 0.9. The data are at the _____ level of measurement.

Ordinal

Which of the following is not a level of measurement? Nominal Quantitative Ratio Ordinal

Quantitative

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Ages of children 4,5,6,7 & 8.

Ratio

Determine whether the given value is a statistic or a parameter. A sample of students is selected and it is found that 50% own a computer.

Statistic because the value is a numerical measurement describing a characteristic of a sample.

Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a set of data, alert levels are represented as 0 for low, 1 for medium, and 2 for high. The average (mean) of the 632 alert levels is 0.9. What is wrong with the given calculation?

Such data should not be used for calculations such as an average.

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

The nominal level of measurement is most appropriate because the data cannot be ordered.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Blood lead levels of low, medium, and high.

The ordinal level of measurement is most appropriate because the data can be ordered, but differences (obtained by subtraction) cannot be found or are meaningless.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Car lengths measured in feet.

The ratio level of measurement is most appropriate because the data can be ordered ; differences can be found and are meaningful, and there is a natural starting zero point.

A particular country has 50 total states. If the areas of all 50 states are added and the sum is divided by 50, the result is 178,123 square kilometers. Determine whether this result is a statistic or a parameter.

The result is a parameter because it describes some characteristic of a population.

Determine whether the given value is a statistic or a parameter? A study was conducted of all 2481 car owners in a certain country.

The value is a parameter because it is a numerical measurement describing some characteristic of a population.