(a)A host on a cruise ship wants to collect data on the time passengers spend at various activities on board. Which of the following best describes a stratified sample of passengers?The host takes a list of the passengers and selects every 5th passenger until 50 passengers are selected.The host selects the first 50 passengers who board because these passengers are easily accessible.The host forms 2 groups of passengers based on the levels of the ship that the passengers' cabins are on. Then, he selects 25 passengers at random from each group.(b)A bank analyst wants to ask customers who have a mortgage with the bank about the customers' home-buying experiences. Which of the following best describes a convenience sample of customers?The analyst forms groups of 13 customers based on the cities the customers live in. Then, she selects all of the customers in 6 randomly chosen groups.The analyst spends a day calling mortgage customers and selects the first 78 customers who answer because these customers are easily accessible.The analyst uses a computer program to draw 78 customers at random and selects these customers. Every set of 78 customers is equally likely to be drawn by the computer program.(c)A city manager wants to poll residents about a park renovation. Which of the following best describes a cluster sample of residents?The city manager forms 6 groups of residents based on the residents' incomes. Then, she selects 12 residents at random from each group.The city manager takes a list of the residents and selects every 3rd resident until 72 residents are selected.The city manager forms groups of 8 residents based on the streets the residents live on. Then, she selects all of the residents in 9 randomly chosen groups.

Which of the following is an example of stratified sampling?   A sample of 150 people called the campus radio show to express their opinions about the food establishment on campus.   In order to assess student satisfaction with the food establishment on campus, 100 students from each of the schools on campus were randomly selected (100 business, 100 fine arts, 100 humanities, 100 sciences, and 100 technology) for a total of 500 sampled students.   In order for a city to find out if drivers text while driving, 15 blocks within the city were randomly selected and all the residents on those blocks were interviewed.   A health educator wanted to study the sleeping habits of the undergraduate students in her university. For her study, the researcher chose a simple random sample of 600 students to interview.   The human resources department of a large bank wanted to assess the job satisfaction of the bank's workers. The department interviewed 50 workers in the breakroom during a week of morning breaks.

If you select a number of participants for a study of how often they eat out at fast-food restaurants, and you make your selection so that you have an equal representation of people from each of 5 income levels, this constitutes: A. Biased sample B. Stratified sample C. Random sample D. Population

Which of the following is an example of stratified sampling? A sample of 37 people who came to speak before the city council on the proposed water conservation plan were surveyed. The human resources department of a large retail chain wanted to assess the job satisfaction of the retail workers. The department chose 25 of the company's stores at random, and used all of the workers in those 25 branches as the subjects for the study. Proponents of a local ballot measure conduct a survey of the city by randomly selecting 100 potential voters from each of its 18 zip codes. A poll asked a random sample of 1,327 adults whether they supported stronger gun control measures. In order to assess public attitudes on good nutrition the the first 40 people to leave a large grocery store were interviewed.

(a)A manager at a bus company wants to survey employees about the new uniforms. Which of the following best describes a random sample of employees?The manager asks for volunteers and selects every volunteer until 60 employees are selected. She selects the volunteers because these employees are easily accessible.The manager forms groups of 12 employees based on the departments the employees are in. Then, she selects all of the employees in 5 randomly chosen groups.The manager uses a computer program to draw 60 employees at random and selects these employees. Every set of 60 employees is equally likely to be drawn by the computer program.(b)A consultant wants to ask workers at a factory about the workers' job satisfaction. Which of the following best describes a stratified sample of workers?The consultant forms groups of 8 workers based on the lengths of time the workers have worked at the factory. Then, he randomly chooses 9 groups and selects all of the workers in these groups.The consultant assigns each worker a different number. Using a random number table, he draws 72 of those numbers at random. Then, the consultant selects the workers assigned to the drawn numbers. Every set of 72 workers is equally likely to be drawn using the random number table.The consultant forms 6 groups of workers based on the workers' shifts. Then, he selects 12 workers at random from each group.(c)A city manager wants to poll residents about a park renovation. Which of the following best describes a convenience sample of residents?The city manager takes a list of the residents and selects every 5th resident until 90 residents are selected.The first 90 residents who walk into city hall one day are easily accessible. So, the city manager selects these residents.The city manager forms 5 groups of residents based on the residents' incomes. Then, she selects 18 residents at random from each group.

(a)The organizers of a conference want to survey attendees about the registration fee. Which of the following best describes a systematic sample of attendees?The organizers assign each attendee a different number. Using a random number table, the organizers draw 50 of those numbers at random. Then, the organizers select the attendees assigned to the drawn numbers. Every set of 50 attendees is equally likely to be drawn using the random number table.The organizers form 2 groups of attendees based on the attendees' employment statuses. Then, the organizers select 25 attendees at random from each group.The organizers take a list of the attendees and select every 5th attendee until 50 attendees are selected.(b)A chemist at a pharmaceutical company wants to test the quality of a new batch of microscopes. Which of the following best describes a convenience sample of microscopes?The chemist takes a list of the microscopes and selects every 3rd microscope until 72 microscopes are selected.The microscopes in the first shipment that was received are easily accessible. So, he selects all 72 of the microscopes in this shipment.The chemist assigns each microscope a different number. Using a random number table, he draws 72 of those numbers at random. Then, he selects the microscopes assigned to the drawn numbers. Every set of 72 microscopes is equally likely to be drawn using the random number table.(c)Counselors at a college want to poll students about how much time the students spend studying. Which of the following best describes a stratified sample of students?The counselors form 4 groups of students based on the numbers of classes the students are taking. Then, the counselors select 16 students at random from each group.The counselors form groups of 8 students based on the students' majors. Then, the counselors select all of the students in 8 randomly chosen groups.The students living in a particular dorm building on campus are easily accessible. So, the counselors select the 64 students living in that particular dorm building.