chapter 7 stats hw

# chapter 7 stats hw - Ch. 07 HW Your response has been...

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Ch. 07 HW Your response has been submitted successfully. Points Awarded 23 Points Missed 1 Percentage 96% 1. A Gallup Poll asked, "In general, how often do you experience stress in your daily life - never, rarely, sometimes, or frequently?" Gallup's report said, "Results are based on telephone interviews with 1,027 national adults, aged 18 and older, conducted Dec. 6-9, 2007." What is the population for this sample survey? What is the sample? A. The population is the 1027 adults who were interviewed and the sample is adult U.S. residents. B. The population is adult U.S. residents and the sample is the 1027 adults who were interviewed. C. The population is adult U.S. residents and the sample is all those who responded "frequently". D. The population is the 1027 adults who were interviewed and the sample is those who responded "frequently". The population is adult U.S. residents, and the sample is the 1027 adults who were interviewed. Points Earned:1/1 Correct Answer: B Your Response: B You want to ask a sample of college students the question "How much do you trust information about health that you find on the Internet-a great deal, somewhat, not much, or not at all?" You try out this and other questions on a pilot group of 10 students chosen from your class. The class members are Anderson Deng Glaus Nguyen Samuels ArroyoDe Ramos Helling Palmiero Shen Batista Drasin Husain Percival Tse Bell Eckstein Johnson Prince Velasco Burke Fernandez Kim Puri Wallace Cabrera Fullmer MolinaRichards Washburn Calloway GandhiMorgan Rider Zabidi DelluciGarcia Murphy Rodriguez Zhao 2. Choose an SRS of 10 students. Use Table B, starting at line 117. Number the students as ordered in the table, top down and then from left to right. The students are: A. 38,16,32,18,37,6,32,23,32,19. B. 38,16,32,18,37,6,23,19,3,25. C. Washburn, Garcia, Rodriguez, Helling, Wallace, Cabrera, Morgan, Husain, Batista, Nguyen. D. Washburn, Garcia, Rodriguez, Helling, Wallace, Cabrera, Rodriguez, Morgan, Rodriguez, Husain.

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There are 40 students in total, thus they must be labeled from 01 to 40 using two digits. Now follow the procedure of choosing an SRS using a table of random digits. Points Earned:1/1 Correct Answer: C Your Response: C To gather data on a 1200-acre pine forest in Louisiana, the U.S. Forest Service laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of 10% of these plots. 3. How would you label the plots? A. 1,2,3,4,5,etc. B. 01,02,03,04,05 etc. C. A,B,C,D,E, etc. D. 001,002,003,004,005, etc E. 0001,0002,0003,0004, etc. You can label up to 100 items with two digits: 01, 02, . . . , 99, 00. Up to 1000 items can be labeled with three digits, and so on. Always use the shortest labels that will cover your population. In this case the population is the plots in the grid laid by the Forest Service. Since the size of
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## This note was uploaded on 01/13/2012 for the course STATS 1107 taught by Professor James during the Fall '11 term at University of Georgia Athens.

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chapter 7 stats hw - Ch. 07 HW Your response has been...

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