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Chapter 1: Q 1.35. (page 15)
What is the acronym used for simple random sampling without replacement?
The acronym for simple random sampling without replacement is SRS.
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In sampling from a population, state which type of sampling design corresponds to each of the following experimental designs:
(a) Completely randomized design
(b) Randomized block design
Litigation Surveys. In the article, "Non - probability Sampling Designs for Litigation Surveys (Trademark Reporter, Vol. 81, pp. 169-179), J. Jacoby and H. Handlin discussed the controversy about whether nonprobability samples are acceptable as evidence in litigation. The authors randomly selected 26 journals from a list of 1285 scholarly journals in the social and behavioral sciences. They examined all articles published during one year in each of the 26 journals selected with regard to sampling methods. What type of sampling design was used by these two authors in their investigation? Explain your answer.
Before planning and conducting a study to obtain information, what should be done?
Plant Density and Tomato Yield. In "Effects of Plant Density on Tomato Yields in Western Nigeria" (Experimental Agriculture,Vol. 12(1), pp. 43-47 ), B. Adelana reported on the effect of tomato variety and planting density on yield. Four tomato varieties (Harvester, Pusa Early Dwarf, Ife No. 1, and Ibadan Local ) were grown at four densities ( 10,000, 20,000, 30,000, and 40,000 plants/ha). Identify the
a. experimental units. b. response variable.
c. factor (s). d. levels of each factor.
e. treatments.
Regarding probability sampling:
(a) What is it?
(b) Does probability sampling always yield a representative sample?
(c) Identify some advantages of probability sampling.
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