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OMIS 3200 Final Exam questions well answered to pass
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OMIS 3200 Final Exam questions well answered to pass
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OMIS 3200 Final ExamA Wall Street Journal poll asked 2,150 adults in the U.S. a series of questions to find out their views on
the U.S. economy. The population of interest is:
A) all the females living in the U.S. when the poll was taken.
B) all the adults living in the U.S. when the poll was taken.
C) all the males living in the U.S. when the poll was taken.
D) all the people living in the U.S. when the poll was taken. - correct answer ✔✔B) all the adults living in
the U.S. when the poll was taken.
If the mean, median, and mode for a given population all equal 25, then we know that the shape of the
distribution of the population is ________.
A) skewed to the left
B) symmetrical
C) skewed to the right
D) bimodal - correct answer ✔✔B) symmetrical
A measurement located outside the upper limits of a box-and-whiskers display is ________.
A) always the largest value in the data set
B) an outlier
C) within the lower limits
D) always in the first quartile - correct answer ✔✔B) an outlier
In a statistics class, the following 10 scores were randomly selected: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66.
What is the median?
A) 73.0
B) 77.0
C) 71.0
D) 71.5
,E) 72.0 - correct answer ✔✔E) 72.0
The local amusement park was interested in the average wait time at their most popular roller coaster at
the peak park time (2 p.m.). They selected 13 patrons and had them get in line between 2 and 3 p.m.
Each was given a stopwatch to record the time they spent in line. The times recorded were as follows (in
minutes). 118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118. What is the 65th percentile?
A) 130
B) 99
C) 45
D) 120
E) 112 - correct answer ✔✔D) 120
The local amusement park was interested in the average wait time at their most popular roller coaster at
the peak park time (2 p.m.). They selected 13 patrons and had them get in line between 2 and 3 p.m.
Each was given a stopwatch to record the time they spent in line. The times recorded were as follows (in
minutes). 118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118. What is the IQR?
A) 28
B) 7
C) 103
D) 30
E) 5 - correct answer ✔✔E) 5
The local amusement park was interested in the average wait time at their most popular roller coaster at
the peak park time (2 p.m.). They selected 13 patrons and had them get in line between 2 and 3 p.m.
Each was given a stopwatch to record the time they spent in line. The times recorded were as follows (in
minutes). 118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118. What are the lower and upper
limits (inner fence)?
A) 108.5, 128.5
B) 15.75, 31.50
C) 80.5, 154.00
D) 127.75, 138.25
E) 143.50, 154.00 - correct answer ✔✔A) 108.5, 128.5
,A Wall Street Journal poll asked 2,150 adults in the U.S. a series of questions to find out their view on the
U.S. economy. The 2,150 adults make up:
A) the sample.
B) the primary data source.
C) the secondary data source.
D) the population. - correct answer ✔✔A) the sample.
The estimation of the population average family expenditure on food based on the sample average
expenditure of 1,000 families is an example of:
A) a parameter.
B) a statistic.
C) descriptive statistics.
D) inferential statistics. - correct answer ✔✔C) descriptive statistics.
An identification of police officers by rank would represent a(n) ________ level of measurement.
A) ordinal
B) interval
C) ratio
D) nominative - correct answer ✔✔A) ordinal
________ is the science of using a sample to make generalizations about the important aspects of a
population.
A) Random sample
B) Descriptive statistics
C) Statistical inference
D) Time series analysis - correct answer ✔✔C) Statistical inference
The change in the daily price of a stock is what type of variable?
A) Random
, B) Ordinal
C) Quantitative
D) Qualitative - correct answer ✔✔C) Quantitative
________ and ________ are used to describe qualitative (categorical) data.
A) Pie charts ; histograms
B) Scatter plots ; histograms
C) Box plots ; bar charts
D) Bar charts ; pie charts - correct answer ✔✔C) Box plots ; bar charts
Which one of the following graphical tools is used with quantitative data?
A) Bar chart
B) Histogram
C) Pareto chart
D) Pie chart - correct answer ✔✔B) Histogram
When developing a frequency distribution, the class (group) intervals should be ________.
A) equal
B) integer
C) small
D) large
E) mutually exclusive - correct answer ✔✔E) mutually exclusive
If a population distribution is skewed to the right, then, given a random sample from that population,
one would expect that the ________.
A) median would be equal to the mean
B) median would be less than the mean
C) mode would be equal to the mean
D) median would be greater than the mean - correct answer ✔✔B) median would be less than the mean
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