What color is the sky, business and finance homework help
1. |
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Multiple Choice |
Select __C_ What A) brown B) pink C) blue D) green
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2.
Two Which A) The first study is an observational study, B) Both studies are considered observational C) The first study is an experiment, while the D) Both studies are observational studies E) Both studies are experiments. |
3.
Which A) The cost of conducting it is prohibitive. B) Regression analysis is needed to properly C) A cause-and-effect relationship can be D) Participants should be informed that they E) Interim variables are more difficult to |
Vitamin D is
found in many dietary sources such as fish, eggs and milk. However, vitamin D
supplements may be necessary for older people. In one research study
participants were randomly provided with either 50 or 100 grams of vitamin D
daily, and the total number of sinus headaches they had was noted. In a second
study, people filled out a questionnaire asking about the hours per week they
spent exercising and the number of sinus headaches they had during a six month
period.
Which of the
following is a true statement?
A) The first study provides weaker evidence than
the second study.
B) The first study was an experiment without a
control group, while the second was an observational study.
C) The second study has the strongest validity
and could suggest the need for future research.
D) Both studies were observational studies.
E) None of the above is a correct statement.
High blood
pressure affects 1 in 4 American adults. In one study on the effect of calcium
on blood pressure, 500 participants who said
they were long-time calcium takers had their blood pressure compared with those
of 500 subjects who had never taken calcium. In a second study, 100 subjects
were randomly selected to be given calcium and 100 were selected to be given a
placebo.
Which of the
following is a true statement?
A) The first study establishes a precedent, while
the second provides little new information.
B) Both studies would be costly to conduct.
C) The first study was an observational study,
while the second was a controlled experiment.
D) Both studies could not be conducted
simultaneously.
E) Each study was part controlled experiment and
part observational study.
1.
Which I. II. III. A) I and II B) I, II, and III C) II and III D) I and III E) None of the above gives the complete set of |