UL MBA Stats - Chapter 2 Questions With All
Correct Answers
frequency table correct answer -a grouping of qualitative data into
mutually exclusive and collectively exhaustive classes showing the number of
observations in each class
bar chart correct answer -A graph that shows qualitative classes on the
horizontal axis and the frequencies on the vertical axis. The class frequencies
are proportional to the heights of the bars.
pie chart correct answer -A chart that shows the proportion or percentage
that each class represents of the total number of frequencies.
frequency distribution correct answer -A grouping of qualitative data into
mutually exclusive and collectively exhaustive classes showing the number of
observations in each class
Step 1 to create a frequency distribution correct answer -Decide the total
number of classes. A useful recipe to determine the number of classes (k) is
the "2 to the k rule." This guide suggests you select the smallest number (k)
for the number of classes such that 2^k (in words, 2 raised to the power of k)
is greater than the number of observations (n).
Step 2 to create a frequency distribution correct answer -Determine the
class interval. Generally, the class interval is the same for all classes. The
classes all taken together must cover at least the distance from the minimum
value in the data up to the maximum value. Expressing these words in a
formula:
i>= (Maximum Value - Minimum Value)/ k
where i is the class interval, and k is the number of classes
Step 3 to create a frequency distribution correct answer -Set the individual
class limits. State clear class limits so you can put each observation into only
one category. This means you must avoid overlapping to unclear class limits
, convert a frequency distribution to a relative frequency distribution correct
answer -each class frequencies is divided by the total number of
observations
class frequency correct answer -the number of observations in each class
class midpoint correct answer -Halfway between the lower or upper of
two consecutive classes. It is computed by adding the lower or upper limits of
consecutive classes and dividing by 2.
histogram correct answer -A graph in which the classes are marked on the
horizontal axis and the classes are marked on the horizontal axis and the class
frequencies on the vertical axis. The class frequencies are represented by the
heights of the bars, and the bars are drawn adjacent to each other
frequency polygon correct answer -Shows the shape of the distribution
and is similar to a histogram. It consists of line segments connecting the points
formed by the intersections of the class midpoints and the class frequencies.
The midpoint of each class is scaled on the X-axis and the class frequencies on
the Y-axis.
Advantage of the frequency polygon over the histogram correct answer -It
allows us to compare directly two or more frequency distributions.
cumulative frequency distribution correct answer -Scale the upper limit of
each class along the X-axis and the corresponding cumulative frequencies
along the y-axis. To provide additional information, you can label the vertical
axis on the right in terms of cumulative relative frequencies.
cumulative frequency polygon correct answer -
cumulative relative frequency distribution correct answer -Shows the
percent of observations less than a given value.
cumulative relative frequency polygon correct answer -
The number of observations in each class is called the class ____________.
-limit
-interval
Correct Answers
frequency table correct answer -a grouping of qualitative data into
mutually exclusive and collectively exhaustive classes showing the number of
observations in each class
bar chart correct answer -A graph that shows qualitative classes on the
horizontal axis and the frequencies on the vertical axis. The class frequencies
are proportional to the heights of the bars.
pie chart correct answer -A chart that shows the proportion or percentage
that each class represents of the total number of frequencies.
frequency distribution correct answer -A grouping of qualitative data into
mutually exclusive and collectively exhaustive classes showing the number of
observations in each class
Step 1 to create a frequency distribution correct answer -Decide the total
number of classes. A useful recipe to determine the number of classes (k) is
the "2 to the k rule." This guide suggests you select the smallest number (k)
for the number of classes such that 2^k (in words, 2 raised to the power of k)
is greater than the number of observations (n).
Step 2 to create a frequency distribution correct answer -Determine the
class interval. Generally, the class interval is the same for all classes. The
classes all taken together must cover at least the distance from the minimum
value in the data up to the maximum value. Expressing these words in a
formula:
i>= (Maximum Value - Minimum Value)/ k
where i is the class interval, and k is the number of classes
Step 3 to create a frequency distribution correct answer -Set the individual
class limits. State clear class limits so you can put each observation into only
one category. This means you must avoid overlapping to unclear class limits
, convert a frequency distribution to a relative frequency distribution correct
answer -each class frequencies is divided by the total number of
observations
class frequency correct answer -the number of observations in each class
class midpoint correct answer -Halfway between the lower or upper of
two consecutive classes. It is computed by adding the lower or upper limits of
consecutive classes and dividing by 2.
histogram correct answer -A graph in which the classes are marked on the
horizontal axis and the classes are marked on the horizontal axis and the class
frequencies on the vertical axis. The class frequencies are represented by the
heights of the bars, and the bars are drawn adjacent to each other
frequency polygon correct answer -Shows the shape of the distribution
and is similar to a histogram. It consists of line segments connecting the points
formed by the intersections of the class midpoints and the class frequencies.
The midpoint of each class is scaled on the X-axis and the class frequencies on
the Y-axis.
Advantage of the frequency polygon over the histogram correct answer -It
allows us to compare directly two or more frequency distributions.
cumulative frequency distribution correct answer -Scale the upper limit of
each class along the X-axis and the corresponding cumulative frequencies
along the y-axis. To provide additional information, you can label the vertical
axis on the right in terms of cumulative relative frequencies.
cumulative frequency polygon correct answer -
cumulative relative frequency distribution correct answer -Shows the
percent of observations less than a given value.
cumulative relative frequency polygon correct answer -
The number of observations in each class is called the class ____________.
-limit
-interval
