Exam 3: Numerical Descriptive Measures

True or False: In general,a frequency distribution should have at least 8 class groups but no more than 20.

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,of the males in the sample,________ percent owned a portable Blu-ray player.

TABLE 2-10 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Table 2-10,90% of the job applicants scored above or equal to ________.

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 relative frequency or percentage distribution for the detergent data,using "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. -Referring to Table 2-18,what was the lowest level of satisfaction?

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,construct a table of column percentages.

According to the Chebyshev rule,at least what percentage of the observations in any data set are contained within a distance of 3 standard deviations around the mean?

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 of at least 80?

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,the number of job applicants who scored between 30 and below 60 is ________.

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,half of the job applicants scored below ________.

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,of those who owned a portable Blu-ray player in the sample,________ percent were females.

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 the students in the population to spend the weekend studying and do poorly on the midterm.

In a perfectly symmetrical distribution,

When extreme values are present in a set of data,which of the following descriptive summary measures are most appropriate?

TABLE 2-9 The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town. -Referring to Table 2-9,the relative frequency of the second class is ________.

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 females who owned a portable Blu-ray player.

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 relative frequency of the third class would be ________.

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 cumulative percentage of the second class would be ________.

Retailers are always interested in determining why a customer selected their store to make a purchase.A sporting goods retailer conducted a customer survey to determine why its customers shopped at the store.The results are shown in the bar chart below.What proportion of the customers responded that they shopped at the store because of the merchandise or the convenience?

TABLE 2-17 The following table presents total retail sales in millions of dollars for the leading apparel companies over a two-year period. -Referring to Table 2-17,among the 8 stores,________ saw a sales decline.