A measurement scale that rates product quality as either 1 = poor, 2 = average and 3 = good is known as:
A) nominal.
B) ordinal.
C) interval.
D) ratio.
Q. 2Dr. Thomas graduated from West Virginia University with a code value = 1 while Professor Harrison graduated from the Marshall University with a code value = 2. The scale of measurement likely represented by this information is:
A) nominal.
B) ordinal.
C) interval.
D) ratio.
Q. 3What is the correct ranking of data from weakest or lowest level to strongest or highest level?
A) nominal, ordinal, interval and ratio
B) ordinal, nominal, interval and ratio
C) interval, nominal, ratio and ordinal
D) nominal, interval, ordinal, and ratio
Q. 4Which of the following variables is an example of a categorical variable?
A) The amount of money you spend on eating out each month.
B) The time it takes you to write a test.
C) The geographic region of the country in which you live.
D) The weight of a cereal box.
Q. 5The time between arrivals at an ATM machine follows an exponential distribution with = 10
minutes. Find the mean and standard deviation of this distribution.
A) Mean = 10, Standard Deviation = 100 B) Mean = 10, Standard Deviation = 10
C) Mean = 10, Standard Deviation = 3.16 D) Mean = 3.16, Standard Deviation = 3.16
Q. 6Suppose that the random variable x has an exponential distribution with = 1.5. Find the
probability that x will assume a value within the interval 2.
A) .864665 B) .049787 C) .950213 D) .716531