Hypothesis Testing PSY/ 315 University of Phoenix May 2015 What is Hypothesis Testing? O “[…method for determining the probability of an observed event that occurs only by chance” (Allua & Thompson‚ 2009). O Two hypothesis types: null and research O Does not prove but suggests that the hypothesis is plausible O Five steps of the method Null Hypothesis O No difference between groups compared O The difference is null O In a control and treatment group it states that the treatment had no effect
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Random samples of size n are selected from each of k populations. It will be assumed that the k populations are independent and normally distributed with means [pic][pic] and common variance [pic]. We wish to derive appropriate methods for testing the hypothesis: [pic] [pic] [pic] at least two of the means are not equal. Table 1 K random samples | |Population | | |
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important that we understand the growing issue of illicit drug use in the workplace. 70% of the estimated 14.8 million Americans who use illegal drugs are employed. Marijuana is the most commonly used and abused illegal drug by employees‚ followed by cocaine‚ with prescription drug use steadily increasing (“Drugs” 1). The federal government does not require most private companies or individuals to have a drug-free workplace policy exceptions include federal contractors and grantees as well as safety-sensitive
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Hypothesis Testing Hypothesis Testing In today’s world of statistical research there is a multitude of ways to make new discoveries and formulate new ideas; one way to accomplish this is for researchers to have inquiring minds that need to have their questions answered. To do this they must develop their hypothesis. Then researchers can develop a verbal and numerical hypothesis in which they will be able to test this hypothesis. In patients with Attention Deficit Hyperactivity Disorder (ADHD)
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Every four out of five workplaces in the United States since 2006 now require you to take a pre-employment drug test . All employers should be able to give their employees a drug test randomly. But‚ the question is should employers be allowed to do random drug testing and that’s a big yes from eighty-four percent of all employers. There are many reasons why the employer should drug test at the workplace like to make the workplace a safer environment‚ also to maintain productivity and attendance
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Drug Testing in the Workplace: A Costly Mistake Abstract The issue of drug testing in the workplace has sparked an ongoing debate among management. There are many who feel that it is essential to prevent risks to the greater public caused by substance abuse while on the job. However‚ others believe that the costs far outweigh the benefits and that it is an invasion of privacy. Putting all ethical issues aside‚ evidence presented in this paper supports the latter. The costs of drug testing are
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Psychological Testing in the Workplace Introduction Psychological tests are popular among private and public companies‚ government agencies and in the military as well. Psychological testing is used for several purposes‚ they can be used in the pre-employment process‚ and they can be used as an aid in regarding employment retention as well as in job placement. While the uses of psychological testing are wide spread‚ there are issues revolving around the validity and reliability of these tests
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Drug Testing in the Workplace Thesis statement: Administering a drug and alcohol policy can be challenging‚ but it can also be beneficial to the manufacturing company. I. Administering a drug and alcohol policy can be challenging. A. The company must comply with State and Federal laws when administering the drug and alcohol policy. B. The company must make sure the implementation of the test is done in a uniform manner. C. Some employees may bring law suits against the employer
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looking at the history of workplace testing‚ then discuss some types of psychological tests‚ how these tests benefit employers‚ common testing instruments‚ institutions that use these tests‚ and some related limitations and legal concerns. History of workplace testing It’s hard to put a date on the inception of psychological testing. Who knows‚ informal means of psychological testing could have been happening between cavemen. But psychological testing in the workplace is a relatively new concept
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Fundamentals of Hypothesis-Testing Methodology Hypothesis testing typically begins with a theory‚ a claim‚ or an assertion about a particular parameter of a population. Some of them are: • The Null and Alternative Hypotheses The hypothesis that the population parameter is equal to the company specification is referred to as the null hypothesis. A null hypothesis is often one of status quo and is identified by the symbol H0. Whenever a null hypothesis is specified‚ an alternative hypothesis is also
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