A PACKAGE DEAL FOR WGU D204 DATA ANALYTICS EXAM
DIFFERENT VERSIONS WITH DETAILED VERIFIED SOLUTIONS
/A+ GRADE ASSURED
A researcher is interested in the travel time of Utrecht University students to college.
A group of 50 students is interviewed. Their mean travel time in 16.7 minutes. For
this study the mean of 16.7 minutes is an example of a(n)
A. Parameter
B. Statistic
C. Population
D. Sample - ANSWER: Statistic
A researcher is curious about the IQ of students at the Utrecht University. The entire
group students is an example of a:
A. Parameter
B. Statistic
C. Population
D. Sample - ANSWER: Population
Statistical techniques that summarize and organize the data are classified as:
A. Population statistics
B. Sample statistics
C. Descriptive statistics
D. Inferential statistics - ANSWER: Descriptive Statistics
A sports psychologist was interested in the effects of a six-week imagery intervention
on an athlete's ability to execute a sport-specific skills such penalty taking in football.
How might you define the imagery variable?
A. Independent variable
B. Dependent variable
C. Outcome variable
D. Resultant variable - ANSWER: Independent variable
Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree)
are frequently used to measure motivations and attitudes. A Likert scale is a:
A. Discrete variable.
B. Ordinal variable.
C. Categorical variable.
D. All of the above options (A, B and C) - ANSWER: All of the above
In a 500m speed skating race, time results would be considered an example of which
level of measurement?
A. Nominal
B. Ordinal
C. Interval
, D. Ratio - ANSWER: Ratio
IQ tests are standardized so that the mean score is 100 for the entire group of
people who take the test. However, if you select a group of 50 who took the test,
you probably would not get 100. What statistical concept explains the difference
between the two means?
A. Statistical error
B. Inferential error
C. Residual error
D. Sampling error - ANSWER: Sampling error
A researchers studies the factors that determine the number of children future
couples decide to have. The variable 'number of children' is a :
A. Discrete variable
B. Continuous variable
C. Categorical variable
D. Ordinal variable - ANSWER: Discrete variable
A teacher asks students to identity their favorite reality television show. What type
of measurement scale do the different television shows make up?
A. Nominal
B. Ordinal
C. Interval
D. Ratio - ANSWER: Nominal
The median is always:
A. The most frequently occurring score in a data set
B. The middle score when results are ranked in order of magnitude
C. The same as the mean
D. The difference between the maximum and minimum scores. - ANSWER: The
middle score when results are ranked in order of magnitude
The seminar rooms in the library are identified by the letters A to H. A researcher
records
the number of classes held in each room during the first semester. What kind of
graph would be appropriate to present the frequency distributions of these data?
A. Histogram
B. Scatterplot
C. Bar chart
D. Box plot - ANSWER: Bar chart
A set of scores is presented in a histogram. The histogram shows a series of bars that
tend to decrease in height from left to right. What is the shape of the distribution?
A. Leptokurtic
B. Positively skewed
C. Negativity skewed
D. Normal - ANSWER: Positively skewed
DIFFERENT VERSIONS WITH DETAILED VERIFIED SOLUTIONS
/A+ GRADE ASSURED
A researcher is interested in the travel time of Utrecht University students to college.
A group of 50 students is interviewed. Their mean travel time in 16.7 minutes. For
this study the mean of 16.7 minutes is an example of a(n)
A. Parameter
B. Statistic
C. Population
D. Sample - ANSWER: Statistic
A researcher is curious about the IQ of students at the Utrecht University. The entire
group students is an example of a:
A. Parameter
B. Statistic
C. Population
D. Sample - ANSWER: Population
Statistical techniques that summarize and organize the data are classified as:
A. Population statistics
B. Sample statistics
C. Descriptive statistics
D. Inferential statistics - ANSWER: Descriptive Statistics
A sports psychologist was interested in the effects of a six-week imagery intervention
on an athlete's ability to execute a sport-specific skills such penalty taking in football.
How might you define the imagery variable?
A. Independent variable
B. Dependent variable
C. Outcome variable
D. Resultant variable - ANSWER: Independent variable
Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree)
are frequently used to measure motivations and attitudes. A Likert scale is a:
A. Discrete variable.
B. Ordinal variable.
C. Categorical variable.
D. All of the above options (A, B and C) - ANSWER: All of the above
In a 500m speed skating race, time results would be considered an example of which
level of measurement?
A. Nominal
B. Ordinal
C. Interval
, D. Ratio - ANSWER: Ratio
IQ tests are standardized so that the mean score is 100 for the entire group of
people who take the test. However, if you select a group of 50 who took the test,
you probably would not get 100. What statistical concept explains the difference
between the two means?
A. Statistical error
B. Inferential error
C. Residual error
D. Sampling error - ANSWER: Sampling error
A researchers studies the factors that determine the number of children future
couples decide to have. The variable 'number of children' is a :
A. Discrete variable
B. Continuous variable
C. Categorical variable
D. Ordinal variable - ANSWER: Discrete variable
A teacher asks students to identity their favorite reality television show. What type
of measurement scale do the different television shows make up?
A. Nominal
B. Ordinal
C. Interval
D. Ratio - ANSWER: Nominal
The median is always:
A. The most frequently occurring score in a data set
B. The middle score when results are ranked in order of magnitude
C. The same as the mean
D. The difference between the maximum and minimum scores. - ANSWER: The
middle score when results are ranked in order of magnitude
The seminar rooms in the library are identified by the letters A to H. A researcher
records
the number of classes held in each room during the first semester. What kind of
graph would be appropriate to present the frequency distributions of these data?
A. Histogram
B. Scatterplot
C. Bar chart
D. Box plot - ANSWER: Bar chart
A set of scores is presented in a histogram. The histogram shows a series of bars that
tend to decrease in height from left to right. What is the shape of the distribution?
A. Leptokurtic
B. Positively skewed
C. Negativity skewed
D. Normal - ANSWER: Positively skewed
