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Module 1-6 practice questions
Data-Driven Decision Making (Western Governors University)
Studocu is not sponsored or endorsed by any college or university
Module 1-6 practice questions
Data-Driven Decision Making (Western Governors University)
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Module 1
1. _________________is the discovery, analysis and communication of meaningful
patterns in data
. Analytics
2. _________________is a prejudice in data that results when either the respondent or the interviewer have and agenda that afects responses
. Information Bias
3. _________________places data into categories that are ordered by a predetermined criteria
. Ordinal Data
4. _________________occurs when something (for example data or survey response) is missing
. Omission Error
5. _________________is numerical data that is ordered, is equal distance apart
and does not have a natural zero.
Interval Data
6. _________________is consistent and repeatable
. Reliable Data
7. _________________represents errors in data caused by unpredictable statistical fuctuations
. *
Random Error
8. _________________places data into “either or” categories or identifes by name or characteristic. *
Nominal Data
9. _________________includes cleaning and storage of collected data
. *
Data Management
10. _________________is a massive amount of data
that is difcult to process using traditional database and software techniques. Big Data
11. _________________is numerical data that has a natural zero
allowing this
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Ratio Data
12. _________________is a prejudice in data that results when the sample is not representative of the population
be tested Measurement Bias
13. Why is quantitative analysis and analytics important in decision making.
Decisions are less subjective
Analytics can be explanatory
Managers can build predictive models
14. Sales for the Northern Region are expected to decrease
2% in the next fscal year
Predictive Analysis
15. The median household income for New York City from 2009 – 2013 is $58,003
. Descriptive Analysis
16. Alternating two trains
between 5:00 p.m. and 7:00 p.m. will increase on time arrivals
Prescriptive Analysis
17. The largest consumer group
of the product is female. Descriptive Analysis
18. Employee turnover for the organization will be more than 5%. Predictive Analysis
19. Increasing the ratio
of ingredient A to ingredient B to 1:1.5 will yield more product
. Prescriptive Analysis
20. Stage 1 of the Davenport-Kim Three-stage Model
includes which two of the following steps? *
Review of previous Problem Recognition
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21. Stage 2 of the Davenport-Kim Three-stage Model
includes which two of the following steps? *
Solve the problem Data collection
Measurement Scale
1.
Which data type is types of cars
produced in a factory? Nomina
l
2.
Which data type is distance between
each process step measured in
inches
? Ratio
4. Which data type is the age group
of survey participants? Ordinal
5. What type of data is a pain scale
(
example: 1 – 10
)? Interval
6. What type of data are women’s dress sizes
? Interval
7. What type of data is the age of each participant in a survey
? Ratio
7. What type of data are sales total for the day in dollars
? Ratio
8. Select the elements of an Experimental Study
: (Choose 3) Response
Treatments
Experimental units
DATA MANAMMENT AND DATA ERROR
1. This bias occurs if the sample is not randomized
. Measurement
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2.
When an instrument produces a consistent
output, it is: Reliable
3.
This type of error will cancel itself out
over a large number of measurements. Random
4.
The use of a placebo that is known
by the treatment allocator or researcher is considered a(n): Blind Study
5.
Cleaning and storing collected data is: Data Management
Module 2
1. Which of the following statistics are unafected by a single large outlier
? Median
Interquartile range (IQR)
Mode
2. Which of the following is most suitable for policy making based on income
distribution? *
Median
3. If we study data from a population whose mean is 200 and standard deviation is 30, which of the following data points has a z-score of -3? *
110
4. Which of the following statistics measures the spread of the dataset away from mean? Variance
5.
Which of the following are measures of spread or variability of a dataset
? Interquartile Range (IQR)
Range
Variance
6. An experiment consists of rolling a die and
fipping a coin. Which two choices below best apply for computing the probability of rolling a 6 on a die AND fipping head on a coin? Downloaded by Testing Improvements (testimprovements@gmail.com)
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Multiplication & Intersection
7. An experiment consists of rolling a die and fipping a coin. Which two choices below best apply for computing the probability
of rolling a 6 on a die OR
fipping head on a coin? Addition & Union
8. The probability
that a baby is a girl, given that
the baby is wearing pink is 0.8. The probability that a baby is a girl is 0.5. Which of the choices below best applies for determining the probability that a baby is wearing pink GIVEN THAT
the baby is a girl? Bayes
9. A government ofcial noticed that Total US Highway Fatality Rate was strongly correlated to the tons of lemons imported. Before concluding that the more lemons we import the lower the fatality rate, what is the main issue should the ofcial think about here? What is the slope of the regression line?
11. For the scatter diagram below, which of the following describes the correlation? Downloaded by Testing Improvements (testimprovements@gmail.com)
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