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ch01 - Ch.1 DataCollection 1.1...

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Ch. 1 Data Collection 1.1 Introduction to the Practice of Statistics 1 Define Statistics and Statistical Thinking SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) What is statistics? MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 2) Which of the following is not true of statistics? A) Statistics is used to answer questions with 100% certainty. B) Statistics involves collecting and summarizing data. C) Statistics can be used to organize and analyze information. D) Statistics is used to draw conclusions using data. 2 Understand the Process of Statistics SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) A survey of 1877 American households found that 69% of the households own a computer. Identify the population, the sample, and the individuals in the study. 2) A survey of 1098 American households found that 33% of the households own at least two cars. Identify the population, the sample, and the individuals in the study. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 3) Parking at a large university has become a very big problem. University administrators are interested in determining the average parking time (e.g. the time it takes a student to find a parking spot) of its students. An administrator inconspicuously followed 230 students and carefully recorded their parking times. Identify the population of interest to the university administration. A) the parking times of the entire set of students that park at the university B) the parking times of the 230 students from whom the data were collected C) the entire set of faculty, staff, and students that park at the university D) the students that park at the university between 9 and 10 AM on Wednesdays 4) A manufacturer of cellular phones has decided that an assembly line is operating satisfactorily if less than 0.0 4% of the phones produced per day are defective. To check the quality of a day ʹ s production, the company decides to randomly sample 50 phones from a day ʹ 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 50 responses: defective or not defective D) the 0.04% of the phones that are defective Page 1
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5) 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 - six hundred Florida residents were surveyed. Which of the following is the population used in the study? A) all Florida residents
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This note was uploaded on 06/06/2010 for the course EC 11 taught by Professor All during the Spring '10 term at UCLA.

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ch01 - Ch.1 DataCollection 1.1...

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