BUAL 5380 LATEST EXAMS TEST PAPER QUESTIONS
AND ANSWERS SURE A+
✔✔exactly 0.50 - ✔✔In a histogram, the percentage of the total area which must be to
the left of the median is:
✔✔representative of the population - ✔✔In order for the characteristics of a sample to
be generalized to the entire population, it should be:
✔✔discrete and continuous - ✔✔Numerical variables can be subdivided into which two
types?
✔✔sample of the population - ✔✔Researchers may gain insight into the characteristics
of a population by examining a
✔✔95% - ✔✔Suppose that a histogram of a data set is approximately symmetric and
"bell-shaped" Approximately
what percent of the observations are within two standard deviations of the mean?
✔✔higher than males - ✔✔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:
, ✔✔the strength of the linear relationship between pairs of variables - ✔✔The correlation
is best interpreted
✔✔all of the above - ✔✔The decision making process includes
✔✔interquartile range - ✔✔The difference between the first and third quartile is called
the
✔✔IQR - ✔✔The length of the box in the boxplot portrays the
✔✔is very sensitive to the units of the variables - ✔✔The limitation of covariance as a
descriptive measure of association is that it
✔✔middle observation when the data values are arranged in ascending order - ✔✔The
median can also be described as:
✔✔most frequently occurring value - ✔✔The mode is best described as the
✔✔pivot table - ✔✔The tool that provides useful information about a data set by
breaking it down into subpopulations is
the:
✔✔We are usually on the lookout for large correlations near +1 or - 1 - ✔✔To examine
relationships between two categorical variables, we can use
✔✔both of these choices - ✔✔We can infer that there is a strong relationship between
two numerical variables when
✔✔Correlation, Covariance, scatterplot charts - ✔✔We study relationships among
numerical variables using
✔✔Is there an observable trend? and Is there a seasonal pattern? - ✔✔When we look
at a time series plot, we usually look for which two things?
✔✔Covariance and correlation - ✔✔Which of the following are considered measures of
association?
✔✔all of these options are possible - ✔✔Which of the following are possible
categorizations of data type?
✔✔mean, median and mode - ✔✔Which of the following are the three most common
measures of central location?
AND ANSWERS SURE A+
✔✔exactly 0.50 - ✔✔In a histogram, the percentage of the total area which must be to
the left of the median is:
✔✔representative of the population - ✔✔In order for the characteristics of a sample to
be generalized to the entire population, it should be:
✔✔discrete and continuous - ✔✔Numerical variables can be subdivided into which two
types?
✔✔sample of the population - ✔✔Researchers may gain insight into the characteristics
of a population by examining a
✔✔95% - ✔✔Suppose that a histogram of a data set is approximately symmetric and
"bell-shaped" Approximately
what percent of the observations are within two standard deviations of the mean?
✔✔higher than males - ✔✔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:
, ✔✔the strength of the linear relationship between pairs of variables - ✔✔The correlation
is best interpreted
✔✔all of the above - ✔✔The decision making process includes
✔✔interquartile range - ✔✔The difference between the first and third quartile is called
the
✔✔IQR - ✔✔The length of the box in the boxplot portrays the
✔✔is very sensitive to the units of the variables - ✔✔The limitation of covariance as a
descriptive measure of association is that it
✔✔middle observation when the data values are arranged in ascending order - ✔✔The
median can also be described as:
✔✔most frequently occurring value - ✔✔The mode is best described as the
✔✔pivot table - ✔✔The tool that provides useful information about a data set by
breaking it down into subpopulations is
the:
✔✔We are usually on the lookout for large correlations near +1 or - 1 - ✔✔To examine
relationships between two categorical variables, we can use
✔✔both of these choices - ✔✔We can infer that there is a strong relationship between
two numerical variables when
✔✔Correlation, Covariance, scatterplot charts - ✔✔We study relationships among
numerical variables using
✔✔Is there an observable trend? and Is there a seasonal pattern? - ✔✔When we look
at a time series plot, we usually look for which two things?
✔✔Covariance and correlation - ✔✔Which of the following are considered measures of
association?
✔✔all of these options are possible - ✔✔Which of the following are possible
categorizations of data type?
✔✔mean, median and mode - ✔✔Which of the following are the three most common
measures of central location?
