Question : A survey of high school teenagers reported that 79% of those sampled are interested : 2150355
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
4) A survey of high school teenagers reported that 79% of those sampled are interested in pursuing a college education. Does this statement describe descriptive or inferential statistics?
A) Inferential statistics
B) Descriptive statistics
6) From past figures, it is predicted that 44% of the registered voters will vote in the March primary. Does this statement describe descriptive or inferential statistics?
A) Inferential statistics
B) Descriptive statistics
Solve the problem.
13) Parking at a university has become a problem. University administrators are interested in determining the average time it takes a student to find a parking spot. An administrator inconspicuously followed 100 students and recorded how long it took each of them to find a parking spot. Identify the population of interest to the university administration.
A) the entire set of faculty, staff, and students who park at the university
B) the 100 students about whom the data were collected
C) the entire set of students who park at the university
D) the students who park at the university between 9 and 10 AM on Wednesdays
14) Parking at a university has become a problem. University administrators are interested in determining the average time it takes a student to find a parking spot. An administrator inconspicuously followed 300 students and recorded how long it took each of them to find a parking spot. Identify the variable of interest to the university administration.
A) students who drive cars on campus
B) number of students who cannot find a spot
C) time to find a parking spot
D) number of empty parking spots
15) An assembly line is operating satisfactorily if fewer than 6% of the phones produced per day are defective. To check the quality of a day's production, the company randomly samples 50 phones from a day's production to test for defects. Define the population of interest to the manufacturer.
A) all the phones produced during the day in question
B) the 50 phones sampled and tested
C) the 6% of the phones that are defective
D) the 50 responses: defective or not defective
16) An insurance company conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the previous seven years. The sample was randomly chosen from a national directory of doctors. What is the variable of interest in this study?
A) all cardiologists in the directory
B) the doctor's area of expertise (i.e., cardiology, pediatrics, etc.)
C) the number of doctors who are cardiologists
D) the responses: have been sued/have not been sued for malpractice in the last seven years
17) A study attempted to estimate the proportion of Florida residents who were willing to spend more tax dollars on protecting the Florida coastline from environmental disasters. Forty-five hundred Florida residents were surveyed.Which of the following is the population used in the study?
A) all Florida residents
B) all Florida residents who lived along the coastline
C) the 4500 Florida residents who were surveyed
D) Florida residents willing to spend more tax dollars protecting the coastline from environmental disasters
18) A study attempted to estimate the proportion of Florida residents who were willing to spend more tax dollars on protecting the Florida beaches from environmental disasters. Twenty-three hundred Florida residents were surveyed.Which of the following describes the variable of interest in the study?
A) the 2300 Florida residents surveyed
B) the response to the question "Do you live along the beach?"
C) the response to the question, "Are you willing to spend more tax dollars on protecting the Florida beaches from environmental disasters?"
D) the response to the question "Do you use the beach?"
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
31) A quality inspector tested 71 copiers in an attempt to estimate the average failure rate of the copier model. His study indicated that the number of failures decreased from two years ago, indicating an increase in the reliability of the copiers. Describe the variable of interest to the inspector. 3
32) A high school guidance counselor analyzed data from a sample of 700 community colleges throughout the United States. One of his goals was to estimate the annual tuition costs of community colleges in the United States. Describe the population and variable of interest to the guidance counselor. 3
Solve the problem.
52) What method of data collection would you use to collect data for a study where a drug was given to 38 patients and a placebo to another group of 38 patients to determine if the drug has an effect on a patient's illness?
A) published source
B) survey
C) observational study
D) designed experiment
