Statistics Worksheet With Answer Key Page 2
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20Perform the requested conversions. Round decimals to the
Determine which of the four levels of measurement
nearest thousandth and percents to the nearest tenth of a
(nominal, ordinal, interval, ratio) is most appropriate.
percent, if necessary.
20) Temperatures of the ocean at various depths.
14) Convert 49% to an equivalent fraction and
A) Ordinal
B) Nominal
decimal.
C) Ratio
D) Interval
12
12
A)
, 0.49
B)
, 4.9
25
25
Identify the type of observational study.
49
49
21) A researcher plans to obtain data by following
C)
, 4.9
D)
, 0.49
100
100
those in cancer remission since January of
2002.
A) Retrospective
Use critical thinking to address the key issue.
B) Cross-sectional
15) A questionnaire is sent to 10,000 persons. 5,000
C) Prospective
responded to the questionnaire. 3,000 of the
D) None of these
respondents say that they ʺlove chocolate ice
creamʺ. We conclude that 60% of people love
Is the study experimental or observational?
chocolate ice cream. What is wrong with this
22) A T.V. showʹs executives raised the fee for
survey?
commercials following a report that the show
received a ʺNo. 1ʺ rating in a survey of
Is the study experimental or observational?
viewers.
16) A clinic gives a drug to a group of ten patients
A) Observational
B) Experimental
and a placebo to another group of ten patients
to find out if the drug has an effect on the
Identify the type of observational study.
patientsʹ illness.
23) Researchers collect data by interviewing
A) Experimental
B) Observational
athletes who have won olympic gold medals
from 1980 to 1992.
Use critical thinking to address the key issue.
A) Cross-sectional
17) An airline company advertises that 100% of
B) Prospective
their flights are on time after checking 5
C) Retrospective
randomly selected flights and finding that
D) None of these
these 5 were on time.
Determine which of the four levels of measurement
Determine which of the four levels of measurement
(nominal, ordinal, interval, ratio) is most appropriate.
(nominal, ordinal, interval, ratio) is most appropriate.
24) The temperatures of eight different plastic
18) Studentʹs grades, A, B, or C, on a test.
spheres.
A) Interval
B) Nominal
A) Interval
B) Ordinal
C) Ordinal
D) Ratio
C) Nominal
D) Ratio
Perform the requested conversions. Round decimals to the
nearest thousandth and percents to the nearest tenth of a
percent, if necessary.
19) Convert 0.13 to an equivalent fraction and
percent.
3
13
A)
, 13%
B)
, 13%
25
100
3
13
C)
, 1.3%
D)
, 1.3%
25
100
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