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Chapter 1: Q 1.28. (page 15)
Identify two statistical methods other than a census for obtaining information.
Experimentation and Sampling are the two statistical methods other than a census for obtaining information.
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The members of a population are numbered 1-50.
(a). Use Table I in Appendix A to obtain an SRS of size 6 from the population. Start at the two-digit number in line number 10 and column numbers 10-11, read down the column, up the next, and so on.
(b). If you have access to a random-number generator, use it to solve part (a)
John F. Kennedy. In one of his books, Ted Sorenson, Special Counsel to President John F. Kennedy, presents an intimate biography of the extraordinary man. According to Sorenson, Kennedy "read every fiftieth letter of the thirty thousand comings weekly to the White House." What type of sampling design was Kennedy using in this case? Explain your answer. [SOURCE: FromKennedy: The Classical Biography by Ted Sorenson. Published by Harper Perennial, © 2009.]
The members of a population are numbered 1-90.
(a). Use Table I in Appendix A to obtain SRS of size 5 from the population. Start at the two-digit number in line number 15 and column numbers 25-26, read down the column, up the next, and so on.
(b). If you have access to a random-number generator, use it to solve part (a).
Which of the following sampling procedures involve the use of probability sampling?
a . A college student is hired to interview a sample of voters in her town. She stays on campus and interviews 100 students in the cafeteria.
b . A pollster wants to interview 20 gas station managers in Balti more. He posts a list of all such managers on his wall, closes his eyes, and tosses a dart at the list 20 times. He interviews the people whose names the dart hits
In a designed experiment, there are two factors, say, Factor Aand Factor B. Factor Ahas four levels, say, ; Factor B has two levels, say,.
(a) Construct a schematic for the treatments similar to Table 1.8 on page 27.
(b) Use part ( a ) to determine the number of treatments.
(c) Could you have determined the answer for part ( b ) without constructing the schematic in part ( a )? Explain your answer.
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