test of hypothesis‚ you must always use the 4-step approach: i. S1:the “Null” and “Alternate” hypotheses‚ ii. S2: calculate value of the test statistic‚ iii. S3: the level of significance and the critical value of the statistic‚ iv. S4: your decision rule and the conclusion reached in not rejecting or rejecting the null hypothesis. When asked to calculate p–value‚ S5‚ relate the p-value to the level of significance in reaching your conclusion. If you use MiniTab to perform the hypothesis test‚
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analysis includes two tests. The first test conducted was a hypothesis test to determine whether the job-enrichment program changed the average output. The second test performed measured whether the job-enrichment program reduced the proportion of defective products. PHStat was used to calculate t-scores‚ z-scores and critical values needed in order to determine whether the program would be rejected. Results from the first hypothesis test determined that the job-enrichment program did not consistently
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system. Descriptive studies are done as the first step in a research investigation in order to find more information on a given topic to generate hypothesis. Statistically‚ the researchers made use of the z-test to determine whether the types of inventory they will have‚ has a great effect on their operational period. Z-test assesses if the hypothesis being stated will be rejected or not. Among to 33 small sized licensed drugstore in the town of San Pedro Laguna. Sources of Data The researchers
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the sample data‚ what is the proportion of college graduates who‚ having smoked at some point in their lives‚ were able to stop smoking? Construct a 95% confidence interval for the proportion. (c) What is the p-value? At = 0.01‚ what is your hypothesis testing conclusion? E2. The demand of a certain kind of pen in Fudan student supermarket last year obeys a distribution with an average 27 per day. This year the price of such pen decreases by ￥0.5. A random sample containing 6 days’ purchase amount
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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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Supply Shocks: A Bayesian Analysis Using Long Run Identifying Restrictions”‚ American Journal of Agricultural Economics‚ 78‚ 530-41. Engle R. ..‚ and C. W. J. Granger‚ (1987)‚ “Co-integration and Error Correction: Representation‚ Estimation‚ and Testing”‚ Econometrica‚ 55(2)‚ 251-276. McCalla A. ..‚ (1982)‚ “Impact of Macroeconomic Policies Upon Agricultural Trade and International Agricultural Development”‚ American Journal of Agricultural Economics‚ 64(5)‚ 861-868‚ (December 1982). Orden D.‚ (1986b)
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described Granger causality as follows‚ “(A variable) x is a granger cause of (another variable) y‚ if present y can be predicted with better accuracy by using past values of x rather than by not doing so‚ ceteris paribus.” Literature review In testing for co-integration‚ I will be using the Johansen Procedure. Watson and Teelucksingh (2002) describe it as a maximum likelihood approach‚ based on the factorization Γ=αβ’‚ and is used for determining the maximum number of co-integrating vectors‚ (in
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Project Part B: Hypothesis Testing and Confidence Intervals a. The average (mean) annual income was less than $50‚000 Null Hypothesis: The average annual income was greater than or equal to $50‚000 H₀: µ > 50000 Alternate Hypothesis: The average annual income was less than $50‚000. Ha: µ > 50000 Analysis Plan: Significance Level‚ α=0.05. Since the sample size‚ n > 30 I will use z-test for mean to test the given hypothesis. As the alternative hypothesis is Ha: µ > 50000‚ the given test is
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Case Problem 1: National Health Care Association(Descriptive Statistics) The National Health Care Association is concerned about the shortage of nurses the health care profession is projecting for the future. To learn the current degree of job satisfaction among nurses‚ the association has sponsored a study of hospital nurses throughout the country. As part of this study‚ a sample of 50 nurses was asked to indicate their degree of satisfaction in their work‚ their pay and their opportunities for
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A research hypothesis is a prediction of the outcome of a study. The prediction may be based on an educated guess or a formal theory. Example 1 is a hypothesis for a nonexperimental study. Example 1 It is hypothesized that first grade girls will show better reading comprehension than first grade boys. In Example 1‚ the author is predicting that he or she will find higher comprehension among girls than boys. To test it‚ a nonexperimental study would be appropriate because nothing in the hypothesis
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