WGU C207 Exam with complete
solutions
For companies to attract and retain their best customers they need a complete portrait
of who they are. To develop this portrait companies turn to - ANSWER-Analytics
A manufacturer wants to maximize their factory output while specifically minimizing
labor costs. What type of analytics might they employ to achieve this goal? -
ANSWER-Prescriptive Analytics
What type of data error that occurs in measurement is constant within a data set and is
sometimes caused by faulty equipment or bias? - ANSWER-Systematic
An Educator develops a new standardized test to measure math skills of ninth graders.
She has students in her home state of Ohio take the test. If the test is to be used on a
national level, what type of error might be found in her data? - ANSWER-Measurement
Bias
A city government is trying to determine the national origins of its recent immigrant
population. If a survey of the immigrant population is conducted in English what type of
error might be present in the data? - ANSWER-Omission
The use of Big Data is increasingly important to businesses in competitive markets.
Which of the following characteristics is not true of big data? - ANSWER-Can be
analyzed with traditional spreadsheets
The Davenport-Kim three-stage model consists of framing the problem, solving the
problem, and communicating results. Which two of the following are part of framing the
problem stage? - ANSWER-Determine the scope of the problem
Review of previous findings
A healthcare provider is researching blood glucose levels before and after exercising.
What two elements should be part of any experimental study such as this? -
ANSWER-Treatment procedures
Experimental response
Runners cover 26.2 miles in the Olympics marathon. What level of measurement is
this? - ANSWER-Ratio
What level of measurement is the type of cars produced in Ford factory? - ANSWER-
Nominal
, What level of measurement is this the 10 best cities in the U.S. to retire in? - ANSWER-
Ordinal
What level of measurement are women's dress sizes (2,4,6, etc.)? - ANSWER-Interval
A local school board is studying the impact of a proposed change in testing on math
scores. Bias can be introduced into the study by both students and teachers. Which
research technique would eliminate this type of bias? - ANSWER-Double blind
study
A Company's product development team test 3 new car waxes by waxing 5 cars with
each wax and then running them through a car wash. They then record number of
washes it takes before the wax begins to deteriorate. What is the term for the five cars?
- ANSWER-The experimental unit
An online retailer selling workout apparel has a large increase in sales during December
and declares that their weekly newspaper ad resulted in higher sales. What misuse of
statistics may the retailer have used in making this decision?
0/1 - ANSWER-Association and Causation
An educator collects eighth grade math scores from a local school and used this data to
recommend curriculum changes for grades 8 - 12. What misuse of statistics may the
educator have used in making this recommendation? - ANSWER-Not a representative
sample
An economist wishes to study the distribution of household income in a Midwestern city.
He randomly selects a sample from 12 households. He notices two large incomes in his
sample. Which measure best represents the middle of the incomes? - ANSWER-Median
A cable company offers its customers both cable television and internet. What statistical
rule should be used to determine the probability that customers will have both cable
television and internet? - ANSWER-Multiplication
A department store is considering a new credit policy to reduce defaults on payments.
Its records show that 95% of defaults have at least 2 late payments. Also, 3% of all
customers default and 30% of those customers who have not defaulted have a least 2
late payments. What statistical rule should be used to find the probability that a
customer will default given that at least 2 payments were late? - ANSWER-Bayes
Theorem
Based on quality checks at plastic bags manufacturer, the breaking strength of their
bags has a mean of 50.5 and a standard deviation of 1.6. A customer's test of the bags
finds bag strength of 54.2 or less. Which statistical measure should be used to help
determine the probability of the customer's test occurring? - ANSWER-z-score
solutions
For companies to attract and retain their best customers they need a complete portrait
of who they are. To develop this portrait companies turn to - ANSWER-Analytics
A manufacturer wants to maximize their factory output while specifically minimizing
labor costs. What type of analytics might they employ to achieve this goal? -
ANSWER-Prescriptive Analytics
What type of data error that occurs in measurement is constant within a data set and is
sometimes caused by faulty equipment or bias? - ANSWER-Systematic
An Educator develops a new standardized test to measure math skills of ninth graders.
She has students in her home state of Ohio take the test. If the test is to be used on a
national level, what type of error might be found in her data? - ANSWER-Measurement
Bias
A city government is trying to determine the national origins of its recent immigrant
population. If a survey of the immigrant population is conducted in English what type of
error might be present in the data? - ANSWER-Omission
The use of Big Data is increasingly important to businesses in competitive markets.
Which of the following characteristics is not true of big data? - ANSWER-Can be
analyzed with traditional spreadsheets
The Davenport-Kim three-stage model consists of framing the problem, solving the
problem, and communicating results. Which two of the following are part of framing the
problem stage? - ANSWER-Determine the scope of the problem
Review of previous findings
A healthcare provider is researching blood glucose levels before and after exercising.
What two elements should be part of any experimental study such as this? -
ANSWER-Treatment procedures
Experimental response
Runners cover 26.2 miles in the Olympics marathon. What level of measurement is
this? - ANSWER-Ratio
What level of measurement is the type of cars produced in Ford factory? - ANSWER-
Nominal
, What level of measurement is this the 10 best cities in the U.S. to retire in? - ANSWER-
Ordinal
What level of measurement are women's dress sizes (2,4,6, etc.)? - ANSWER-Interval
A local school board is studying the impact of a proposed change in testing on math
scores. Bias can be introduced into the study by both students and teachers. Which
research technique would eliminate this type of bias? - ANSWER-Double blind
study
A Company's product development team test 3 new car waxes by waxing 5 cars with
each wax and then running them through a car wash. They then record number of
washes it takes before the wax begins to deteriorate. What is the term for the five cars?
- ANSWER-The experimental unit
An online retailer selling workout apparel has a large increase in sales during December
and declares that their weekly newspaper ad resulted in higher sales. What misuse of
statistics may the retailer have used in making this decision?
0/1 - ANSWER-Association and Causation
An educator collects eighth grade math scores from a local school and used this data to
recommend curriculum changes for grades 8 - 12. What misuse of statistics may the
educator have used in making this recommendation? - ANSWER-Not a representative
sample
An economist wishes to study the distribution of household income in a Midwestern city.
He randomly selects a sample from 12 households. He notices two large incomes in his
sample. Which measure best represents the middle of the incomes? - ANSWER-Median
A cable company offers its customers both cable television and internet. What statistical
rule should be used to determine the probability that customers will have both cable
television and internet? - ANSWER-Multiplication
A department store is considering a new credit policy to reduce defaults on payments.
Its records show that 95% of defaults have at least 2 late payments. Also, 3% of all
customers default and 30% of those customers who have not defaulted have a least 2
late payments. What statistical rule should be used to find the probability that a
customer will default given that at least 2 payments were late? - ANSWER-Bayes
Theorem
Based on quality checks at plastic bags manufacturer, the breaking strength of their
bags has a mean of 50.5 and a standard deviation of 1.6. A customer's test of the bags
finds bag strength of 54.2 or less. Which statistical measure should be used to help
determine the probability of the customer's test occurring? - ANSWER-z-score
