1. A Harris Interactive survey of 502 senior human resource executives in the Mid-Atlantic Region asked for the best method of finding the best candidates from a list of methods (e.g. referrals, LinkedIn, etc.).Fifty-eight percent responded that referrals were one of the methods for finding the best candidates.

1. What is the population?

i.502 senior human resource executives in Mid-Atlantic Region

ii.Senior human resources executives in the Mid-Atlantic Region

iii.The methods for finding the best candidates

iv.Fifty-eight percent responding that referrals were one of the methods used

1. What is the sample?

i.502 senior human resource executives in Mid-Atlantic Region

ii.Senior human resources executives in the Mid-Atlantic Region

iii.The methods for finding the best candidates

iv.Fifty-eight percent responding that referrals were one of the methods used

1. What is the type of study?

i.observational

ii.experimental design

iii.secondary source

1. All highway bridges in the U.S. are inspected periodically for structural deficiency by the Federal Highway Administration.Data from the inspections are compiled into the National Bridge Inventory.Several of the nearly 100 variables maintained are listed: (1) Length of maximum span, (2) Whether the bridge has a toll or not (yes/no), (3) Average daily traffic (mean number of cars crossing the bridge daily for the bridge over the time period) (4) When the bridge was constructed (categories: Pre-1920, 1920- 1960, 1960 - 2000, After 2000).

a.Variable (1) is:

i.Quantitative, discrete

ii.Quantitative, continuous

iii.Qualitative, nominal

iv.Qualitative, ordinal

b.Variable (2) is:

i.Quantitative, discrete

ii.Quantitative, continuous

iii.Qualitative, nominal

iv.Qualitative, ordinal

c.Variable (3) is:

i.Quantitative, discrete

ii.Quantitative, continuous

iii.Qualitative, nominal

iv.Qualitative, ordinal

d.Variable (4) is:

i.Quantitative, discrete

ii.Quantitative, continuous

iii.Qualitative, nominal

iv.Qualitative, ordinal

3.A researcher at a university in the U.S. collected estimates from 153 different studies about calorie consumption.He conducted a meta-analysis using the estimates gathered from the studies.What type of study is this?

e.Observational Study

f.Designed Experiment

g.Secondary Source

4.A study was conducted to determine the efficacy of a new tutoring method, method A.Half of the participants were given tutoring method A, and the other half of the participants were given the standard tutoring method.What type of study is this?

h.Observational Study

i.Designed Experiment

j.Secondary Source

5.A study of the spending habits of Americans was conducted.Participants were selected and mailed a survey to fill and return to the researchers of the study.What type of study is this?

k.Observational Study

l.Designed Experiment

m.Secondary Source

6.You are measuring length with a meter stick.However, you do not realize that the first 4.0 centimeters of the meter stick are missing.The measurements you take with the meter stick will be:

i.Accurate, but imprecise

ii.Precise, but not accurate

iii.Accurate and precise

1.The prevalence of a disease is known to be 0.2.The sensitivity of a test for the disease is 0.85; the specificity is 0.98.

a.Calculate the predictive value positive.

i.0.963

ii.0.751

iii.0.914

iv.0.869

b.Calculate the predictive value negative.

i.0.963

ii.0.751

iii.0.914

iv. 0.869