|numerical characteristics of a sample| b.|numerical characteristics of a population| c.|the averages taken from a sample| d.|numerical characteristics of either a sample or a population| ANS: B 3. How many simple random samples of size 3 can be selected from a population of size 7? a.|7| b.|21| c.|35| d.|343| ANS: C 4. Sampling distribution of is the a.|probability distribution of the sample mean| b.|probability distribution of the sample proportion| c.|mean of the sample| d.|mean of the population|
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Statistical significance and the number of analyses performed Strength vs. reliability of a relation between variables Why stronger relations between variables are more significant Why significance of a relation between variables depends on the size of the sample Example: "Baby boys to baby girls ratio" Why small relations can be proven significant only in large samples Can "no relation" be a significant result? How to measure the magnitude (strength) of relations between variables Common
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World Journal of Agricultural Sciences 8 (6): 568-584‚ 2012 ISSN 1817-3047 © IDOSI Publications‚ 2012 DOI: 10.5829/idosi.wjas.2012.8.6.1688 An Insight in Statistical Techniques and Design in Agricultural and Applied Research Ajay S. Singh and Micah B. Masuku Department of Agricultural Economics and Management‚ Faculty of Agriculture‚ University of Swaziland‚ Swaziland Abstract: Advance applied science researches have experienced a dramatic change in knowledge and an exponential increase
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population with unknown variance‚ the t distribution is used. e) The significance level a is the probability of rejecting the null hypothesis when it is false. f) Non-parametric test is used when the data are not normally distributed and the sample size is less than 30. (6 marks) QUESTION 2 Differentiate briefly the following terms: a) Point and interval estimates. b) Type I Error and Type II Error. (4 marks) QUESTION 3 The lifetimes of certain electronic components are approximately normally distributed
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CHAPTER 10 HYPOTHESIS TESTING MULTIPLE CHOICE QUESTIONS In the following multiple-choice questions‚ please circle the correct answer. 1. If a researcher takes a large enough sample‚ he/she will almost always obtain: a. virtually significant results b. practically significant results c. consequentially significant results d. statistically significant results ANSWER: d 2. The null and alternative hypotheses divide all possibilities into: a. two
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Ch 3 Conceptualization and Measurement In chapter 3 of The Practice of Research in Criminology and Criminal Justice there are four areas of focus. They are concepts‚ measurement operations‚ evaluation of measures‚ and levels of measurement. We are going to address conceptualization by using substance abuse and related ideas as examples. For measurement‚ let us review first how measures of substance abuse have been created‚ utilizing procedures as available data‚ questions‚ observations‚ and less
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Customer Trust in the Salesperson: An Integrative Review and Meta-Analysis of the Empirical Literature John E. Swan Michael R. Bowers Lynne D. Richardson UNIVERSITY OF ALABAMA AT BIRMINGHAM The development of trust between salespeople and their customers has traditionally been considered a critical element in developing and maintaining a successful sales relationship. This article presents the first comprehensive literature review and meta-analysis of the antecedents of trust and consequences
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company feels they only need to make one size of shoes‚ regardless of gender or height. They have collected data on gender‚ shoe size‚ and height and have asked you to tell them if they can change their business model to include only one size of shoes – regardless of height or gender of the wearer. In no more 5-10 pages (including figures)‚ explain your recommendations‚ using statistical evidence to support your findings. The data found are below: Shoe Size | Height | Gender | 5.00 | 63.00 | Female
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File size‚ Transfer Rate‚ and Transfer Time Larry Pfaff NT1110 ITT Technical Institute Table 1: Calculating transfer time File Size Transfer Rate Transfer Time 100 MB 56 Kbps 4.16 hr 100 MB 4 Mbps 3.49 hr 2 GB 56 Kbps 3.55 days 2 GB 4 Mbps 1.19 hr Convert file size and transfer rate to bits - S/R=T File size 100 MB Transfer Rate 56 Kbps = 4.16 hr 100*1048576*8/56000=14‚979.66 sec/60min=249.66 min/60(hour) = 4.16 hour File Size 100 MB Transfer Rate 4 Mbps = 3.49 mins 100*1048576*8/4000000=209
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Journal of Counseling Psychology 1983‚ Vol. 30‚ No‚ 3‚459-463 Copyright 1983 by the American Psychological Association‚ Inc. Statistical Significance‚ Power‚ and Effect Size: A Response to the Reexamination of Reviewer Bias Bruce E. Wampold Department of Educational Psychology University of Utah Michael J. Furlong and Donald R. Atkinson Graduate School of Education University of California‚ Santa Barbara In responding to our study of the influence that statistical significance has
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