Exam 3: Numerical Descriptive Measures

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 of detergent in a day?

True or False: Histograms are used for numerical data while bar charts are suitable for categorical data.

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 frequency distribution for the detergent data,using "9.0 but less than 10.0 gallons" as the first class.

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 neutral in the sample,________ percent were males.

You have collected data on the responses to two questions asked in a survey of 40 college students majoring in business-"What is your gender (Male = M; Female = F.?" and "What is your major (Accountancy = A; Computer Information Systems = C; Marketing = M)?" Which of the following is the best for presenting the data?

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 positive relationship between price/earnings ratio and earnings per share.

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

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 did poorly on the midterm to have spent the weekend studying.

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 class midpoint of the second class is ________.

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 frequency of the fifth class would be ________.

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,________ percent of the students in the sample spent the weekend studying and did well on the midterm.

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,________ of the apartments rented for at least $1,300.

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 females who were either neutral or against the plan.

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,________ apartments rented for at least $1,200 but less than $1,400.

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 has the largest leaf associated with the smallest stem visited the facility ________ times.

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 did not own 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,________ percent of the applicants scored between 20 and below 50.

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 50 or above is ________.

Which descriptive summary measures are considered to be resistant statistics?

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,if the sample is a good representation of the population,we can expect ________ percent of the females in the population will not be against the plan.