Test 1 Chapters 1 to 3

A  69

B  32

C  496

D  129.73

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

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

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

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

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

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

A  15.87 ounces, 15.97 ounces

B  15.83 ounces, 16.37 ounces

C  15.92 ounces, 16.28 ounces

D  16.01 ounces, 16.19 ounces

A  84%

B  100%

C  95%

D  68%

A  82.10

B  80.4

C  81.4

D  82.80

A  41.4

B  41.80

C  42.3

D  41.8, 43.7, 41.4

A  4.00

B  10.00

C  3.47

D  2.33

A  Stratified

B  Convenience

C  Cluster

D  Random

E  Systematic

A  Random

B  Convenience

C  Systematic

D  Stratified

E  Cluster

A  Prospective

B  Retrospective

C  Cross-sectional.

A  Observational study

B  Experiment

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

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

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

D  Interval . The true average is 19.2.

A  Interval

B  Ratio

C  Nominal

D  Ordinal

A  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.

B  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.

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

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 data set is neither continuous nor discrete.

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

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

C  The data set is neither continuous nor discrete.

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

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

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

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

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