Exam 3: Numerical Descriptive Measures

TABLE 2-7 The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court. -Referring to Table 2-7,if a frequency distribution with equal sized classes was made from this data,and the first class was "10 but less than 20," the frequency of that class would be ________.

TABLE 2-13 Given below is the stem-and-leaf display representing the amount of detergent used in gallons (with leaves in 10ths of gallons)in a day by 25 drive-through car wash operations in Phoenix. -Referring to Table 2-13,construct a cumulative percentage polygon for the detergent data if the corresponding frequency distribution uses "9.0 but less than 10.0" as the first class.

TABLE 2-18 The stem-and-leaf display below shows the result of a survey of 50 students on their satisfaction with their school,with the higher scores representing a higher level of satisfaction. -The addition of visual elements that either fail to convey any useful information or that obscure important points about the data in an attempt to enhance the visualization of data is called ________.

TABLE 2-16 The figure below is the percentage polygon for the amount of calories for a sample of 36 pizza products where the upper limits of the intervals are: 310,340,370,400 and 430. -Referring to Table 2-16,roughly what percentage of pizza products contains between 340 and 400 calories?

TABLE 2-18 The stem-and-leaf display below shows the result of a survey of 50 students on their satisfaction with their school,with the higher scores representing a higher level of satisfaction. -True or False: Referring to Table 2-18,if a student is randomly selected,his/her most likely level of satisfaction will be in the 70s among the 40s,50s,60s,70s,80s and 90s.

Which of the following is the easiest to compute?

TABLE 2-17 The following table presents total retail sales in millions of dollars for the leading apparel companies over a two-year period. -True or False: Referring to Table 2-17,in general,retail sales for the apparel industry have seen a modest growth between Year 1 and Year 2.

TABLE 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. -Referring to Table 2-12,________ percent of the 200 were against the plan.

True or False: Percentage polygons are plotted at the boundaries of the class groupings.

TABLE 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. -Referring to Table 2-12,________ percent of the 200 were not neutral.

TABLE 2-18 The stem-and-leaf display below shows the result of a survey of 50 students on their satisfaction with their school,with the higher scores representing a higher level of satisfaction. -Referring to Table 2-18,how many students have a satisfaction level in the 50s?

TABLE 2-18 The stem-and-leaf display below shows the result of a survey of 50 students on their satisfaction with their school,with the higher scores representing a higher level of satisfaction. -True or False: Some business analytics involve starting with many variables and are then followed by filtering the data by exploring specific combinations of categorical values or numerical range.In Excel,this approach is mimicked by using a slicer.

TABLE 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Table 2-14,________ percent of the 600 were males who owned a portable Blu-ray player.

TABLE 2-13 Given below is the stem-and-leaf display representing the amount of detergent used in gallons (with leaves in 10ths of gallons)in a day by 25 drive-through car wash operations in Phoenix. -Referring to Table 2-13,if a percentage histogram for the detergent data is constructed,using "9.0 but less than 10.0 gallons" as the first class,the percentage of drive-through car wash operations that use "12.0 but less than 13.0 gallons" of detergent would be ________.

TABLE 2-10 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Table 2-10,________ percent of the job applicants scored between 10 and 20.

TABLE 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. -Referring to Table 2-12,of those for the plan in the sample,________ percent were females.

TABLE 2-18 The stem-and-leaf display below shows the result of a survey of 50 students on their satisfaction with their school,with the higher scores representing a higher level of satisfaction. -True or False: The Guidelines for Developing Visualizations recommend always including a scale for each axis if the chart contains axes.

In a right-skewed distribution,

True or False: Ogives are plotted at the midpoints of the class groupings.

TABLE 2-8 The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility. -Referring to Table 2-8,if a frequency distribution with equal sized classes was made from this data,and the first class was "0 but less than 10," the cumulative percentage of the next-to-last class would be ________.