Administrators at a large university want to know the average debt incurred by their graduates. Surveys were mailed to 200 graduating seniors asking them to report their total student loan debt.
Identify the population, sample, and individuals in the study.
Q. 2A manufacturer of cellular phones has decided that an assembly line is operating satisfactorily if less than 0.04 of the phones produced per day are defective.
To check the quality of a day's production, the company decides to randomly sample 10 phones from a day's production to test for defects. Define the population of interest to the manufacturer.
A) the 10 phones sampled and tested
B) the 10 responses: defective or not defective
C) the 0.04 of the phones that are defective
D) all the phones produced during the day in question
Q. 3The legal profession conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the last three years. The sample was randomly chosen from a national directory of doctors. Identify the individuals in the study.
A) the doctor's area of expertise (i.e., cardiology, pediatrics, etc.)
B) all cardiologists in the directory
C) the responses: have been sued/have not been sued for malpractice in the last three years
D) each cardiologist selected from the directory
Q. 4A survey of 1574 American households found that 73 of the households own at least two bicycles. Identify the population, the sample, and the individuals in the study.
What will be an ideal response?
Q. 5A recent 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. Forty-six hundred Florida residents were surveyed.
Which of the following is the population used in the study?
A) all Florida residents who lived along the beaches
B) all Florida residents
C) the 4600 Florida residents surveyed
D) the Florida residents who were willing to spend more tax dollars on protecting the beaches from environmental disasters
Q. 6A political researcher wishes to gauge political sentiment regarding a proposed tax cut.
He obtains a list of 1000 email addresses from an internet provider, uses a random number table to select a random sample of 100 of these addresses, emails the people in the sample and requests that they respond to his questions by email. Do you think that the group of people who respond is likely to be representative of all registered voters? Explain your answer.
Q. 7the pressure of water coming out of a fire hose
A) discrete B) continuous
Q. 8A study of 3300 college students in the city of Pemblington found that 9 had been victims of violent crimes.
A) statistic B) parameter