BUAL 5380 Final Exam Questions With
All Correct Answers.
Researchers may gain insight into the characteristics of a population by examining a - Answer
B. Sample of the population
Coding males as 1 and females as 0 in a data set illustrates the use of - Answer B. Dummy
variables
The interquartile rage (IQR) represents what percent of the observations? - Answer B. middle
%50
Expressed in percentiles, the interquartile range is the difference between the - Answer D.
35th and 85th percentiles
Data that arise from counts are called - Answer D. Discrete Data
How is the median defined if the number of observations is even - Answer A The average of
the two middle observations
A sample of a population taken at one particular point in time is categorized as - Answer C.
Categorical
What is the most common type of chart for showing the distribution of numerical variable -
Answer B. Histogram
In a generic box plot, the x inside the box indicates the location of the - Answer A Mean
Which of the following are the three most common measures of central tendency? - Answer A
Mean, median, and mode
In order for the characteristics of a sample to be generalized to the entire population, it should
be: - Answer C. Representative of the population
, The average score for a class of 30 students was 75. The 20 male students in the class averaged
70. The 10 female students in the class averaged. - Answer B 85
Gender and state are examples of which type of data - Answer C. Categorical data
If a value represents the 95th percentile, this means that - Answer A. 95% of all values are
below this value
In regression analysis, the variables used to help explain or predict the response variable are
called the - Answer A. Independent variables
A multiple regression analysis including 50 data points and 5 independent variables results in
(formula). The multiple standard error estimate will be. - Answer D. 0.888
The percentage of variation (R2) can be interpreted as the fraction (or percent) of variation of
the - Answer C. Response variable explained by the regression line.
Is/are especially helpful in identifying outliers - Answer D. Scatterplots
In linear regression, we can have an interaction variable. Algebraically, the interaction variable is
the other variables in the regression equation - Answer C. Product
The correlation values ranges from - Answer B. -1 to +1
The percentage of variation (R2) ranges from - Answer 0 to +1
In multiple regression, the coefficients reflect the expected change in: - Answer Y when the
associated X value increases by one unit
The appropriate hypotheses test for an ANOVA test is - Answer B. H0= all B=0, Ha: at least on
be B not equal to 0
In the standardized value b1-B1)1sp, the symbol sb represents the - Answer C. standard error
of b1
All Correct Answers.
Researchers may gain insight into the characteristics of a population by examining a - Answer
B. Sample of the population
Coding males as 1 and females as 0 in a data set illustrates the use of - Answer B. Dummy
variables
The interquartile rage (IQR) represents what percent of the observations? - Answer B. middle
%50
Expressed in percentiles, the interquartile range is the difference between the - Answer D.
35th and 85th percentiles
Data that arise from counts are called - Answer D. Discrete Data
How is the median defined if the number of observations is even - Answer A The average of
the two middle observations
A sample of a population taken at one particular point in time is categorized as - Answer C.
Categorical
What is the most common type of chart for showing the distribution of numerical variable -
Answer B. Histogram
In a generic box plot, the x inside the box indicates the location of the - Answer A Mean
Which of the following are the three most common measures of central tendency? - Answer A
Mean, median, and mode
In order for the characteristics of a sample to be generalized to the entire population, it should
be: - Answer C. Representative of the population
, The average score for a class of 30 students was 75. The 20 male students in the class averaged
70. The 10 female students in the class averaged. - Answer B 85
Gender and state are examples of which type of data - Answer C. Categorical data
If a value represents the 95th percentile, this means that - Answer A. 95% of all values are
below this value
In regression analysis, the variables used to help explain or predict the response variable are
called the - Answer A. Independent variables
A multiple regression analysis including 50 data points and 5 independent variables results in
(formula). The multiple standard error estimate will be. - Answer D. 0.888
The percentage of variation (R2) can be interpreted as the fraction (or percent) of variation of
the - Answer C. Response variable explained by the regression line.
Is/are especially helpful in identifying outliers - Answer D. Scatterplots
In linear regression, we can have an interaction variable. Algebraically, the interaction variable is
the other variables in the regression equation - Answer C. Product
The correlation values ranges from - Answer B. -1 to +1
The percentage of variation (R2) ranges from - Answer 0 to +1
In multiple regression, the coefficients reflect the expected change in: - Answer Y when the
associated X value increases by one unit
The appropriate hypotheses test for an ANOVA test is - Answer B. H0= all B=0, Ha: at least on
be B not equal to 0
In the standardized value b1-B1)1sp, the symbol sb represents the - Answer C. standard error
of b1
