Exam 3: Numerical Descriptive Measures

TABLE 2-15 The figure below is the ogive for the amount of fat (in grams)for a sample of 36 pizza products where the upper boundaries of the intervals are: 5,10,15,20,25,and 30. -Referring to Table 2-15,what percentage of pizza products contains at least 20 grams of fat?

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,the person who visited the health club less than anyone else in the sample visited the facility ________ times.

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,________ of the 100 members visited the health club no more than 12 times in a year.

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: Given below is the scatter plot of the price/earnings ratio versus earnings per share of 20 U.S.companies.There appears to be a negative relationship between price/earnings ratio and earnings per share.

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 at least 340 calories?

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 the females in the sample,________ percent were against the plan.

To evaluate two categorical variables at the same time,a ________ could be developed.

True or False: A polygon can be constructed from a bar chart.

In left-skewed distributions,which of the following is the correct statement?

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,________ percent of the cases were adjudicated within the first 2 years.

True or False: Apple Computer,Inc.collected information on the age of their customers.Suppose the youngest customer was 12 and the oldest was 72.To study the percentage of their customers who are below a certain age,it can use an ogive.

TABLE 2-6 A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying,and whether they did well or poorly on the midterm.The following table contains the result. -Referring to Table 2-6,of those who did well on the midterm in the sample,________ percent of them went bar hopping the weekend before the midterm.

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: Given below is the scatter plot of the market value (thousands$)and profit (thousands$)of 50 U.S.companies.Higher market values appear to be associated with higher profits.

TABLE 2-6 A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying,and whether they did well or poorly on the midterm.The following table contains the result. -Referring to Table 2-6,if the sample is a good representation of the population,we can expect ________ percent of those who spent the weekend studying to do poorly on the midterm.

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 relative frequency or percentage distribution for the detergent data is constructed,using "9.0 but less than 10.0 gallons" as the first class,what percentage of drive-through car wash operations use at least 10 gallons but less than 13 gallons of detergent in a day?

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 owned a portable Blu-ray player.

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: You can compute any of the numerical descriptive statistics for the variables of the new worksheet that a drill-down in a PivotTable creates.

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 the males in the sample,________ percent were for the plan.

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 percentage histogram for the detergent data,using "9.0 but less than 10.0" as the first class.

True or False: A Walmart store in a small town monitors customer complaints and organizes these complaints into six distinct categories.Over the past year,suppose the company has received 534 complaints.One possible graphical method for representing these data would be a Pareto chart.