Chapter 1: Statistics, Data, and Statistical Thinking


Parking at a large university has become a very big problem. University administrators are interested in determining the average parking time of it's students (e.g. the time it takes a student to find a parking spot). An administrator inconspicuously followed 250 students and carefully recorded their parking times. Identify the population of interest to the university administration.


The amount of television viewed by today's youth is of primary concern to Parents Against Watching Television (PAWT). Three hundred parents of elementary school-aged children were asked to estimate the number of hours per week that their child watched television. The mean and the standard deviation for their responses were 15 and 5, respectively. Identify the data collection method used by PAWT in this study.


A manufacturer of cellular phones has decided that an assembly line is operating satisfactorily if less than 3% of the phones produced per day are defective. To check the quality of a day's production, the company decides to randomly sample 30 phones from a day's production to test for defects. Define the population of interest to the manufacturer.


The legal profession conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the last five years. The sample was randomly chosen from a national directory of doctors. What is the variable of interest in this study?


A published report recently stated "Based on a sample of 150 new cars, there is evidence to indicate that the average new car price of all foreign automobiles is significantly higher than the average new car price of all American cars." This statement is an example of a ___________.


A sample of high school teenagers reported that 85% of those sampled are interested in pursuing a college education. This statement is a result of a(n) __________.


A statistics student researched her statistics project in the library and found a reference book that contained the median family incomes for all 50 states. On her project, she would report her data as being collected using __________.


A personnel director at a large company studied the eating habits of the company's employees. The director noted whether an employee brought their own lunch to work, ate at the company cafeteria, or went out to eat lunch. The goal of the study was to improve the company cafeteria. This type of data collection would best be considered as a(n) __________.


Which of the following is not an element of descriptive statistical problems?


A study published in 1990 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-five hundred Florida residents were surveyed.

Which of the following describes the variable of interest in the study?

Note: answer choices in this exercise are randomized.

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