Test 1 Chapters 1 to 3

A  129.73

B  496

C  32

D  69

A  The economics test score is relatively better because its z-score is less than the z-score for the psychology test.

B  The economics test score is relatively better because its z-score is greater than the z-score for the psychology test.

C  The psychology test score is relatively better because its z-score is greater than the z-score for the economics test.

D  The psychology test score is relatively better because its z-score is less than the z-score for the economics test.

A  The psychology test score is relatively better because its z-score is less than the z-score for the economics test.

B  The psychology test score is relatively better because its z-score is greater than the z-score for the economics test.

C  The economics test score is relatively better because its z-score is greater than the z-score for the psychology test.

D  The economics test score is relatively better because its z-score is less than the z-score for the psychology test.

A  15.92 ounces, 16.28 ounces

B  15.83 ounces, 16.37 ounces

C  16.01 ounces, 16.19 ounces

D  15.87 ounces, 15.97 ounces

A  95%

B  100%

C  68%

D  84%

A  82.80

B  82.10

C  80.4

D  81.4

A  41.8, 43.7, 41.4

B  42.3

C  41.80

D  41.4

A  3.47

B  4.00

C  10.00

D  2.33

A  Convenience

B  Cluster

C  Systematic

D  Random

E  Stratified

A  Systematic

B  Convenience

C  Random

D  Cluster

E  Stratified

A  Prospective

B  Cross-sectional.

C  Retrospective

A  Observational study

B  Experiment

A  Ordinal . Such data are not counts or measures of anything, so the average ( mean) has to be computed in a different way.

B  Interval . The true average is 19.2.

C  Ratio. There is nothing wrong with the given calculation.

D  Nominal . Such data are not counts or measures of anything, so it makes no sense to compute their average ( mean).

A  Ratio

B  Ordinal

C  Nominal

D  Interval

A  The ratio level of measurement is most appropriate because the data can be ordered, differrences ( obtain by subtraction) can be found and are meaningful, and there is a natural starting point.

B  The interval level of measurement is most appropriate because the data can be ordered, differrences ( obtain by subtraction) can be found and are meaningful, and there is no natural starting point.

C  The ordinal level of measurement is most appropriate because the data can be ordered, but differrences cannot be found or are meaningless.

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

A  The data set is neither continuous nor discrete.

B  The value is from a continuous data set because the number of possible values is infinite and not countable.

C  The value is from a continuous data set because the number of possible values is infinite and countable.

D  The value is from a discrete data set because the number of possible values is finite or countable.

A  The data set is neither continuous nor discrete.

B  The value is from a continuous data set because there are infinitely many possible values and those values cannot be counted.

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

D  The value is from a continuous data set because the number of possible values is infinite and countable.

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

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

C  The value is a statistic because it is a numerical measurement describing some characteristic of a sample.

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