Quantitative Techniques Lab 5 (Topic 3: Hypothesis Testing) ------------------------------------------------- Procedure for Hypothesis Testing Step 1: Formulate the null and alternative hypothesis. Draw the one-tail or two- tail test diagram. Step 2: Specify the level of significance. Determine the critical value (s). Step 3: Identify the test statistics to be used and calculate it. Step 4: Draw the conclusion. Formulae List Hypothesis Testing Test Statistics for Single Mean
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Using the five steps of hypothesis testing and the 5% significance level (i.e. alpha = .05)‚ does showing the film change students’ attitudes towards the chronically mentally ill? • What does it mean to set alpha at .05? Alpha at .05 means there is a .05 probability or 5% chance of committing a Type I error‚ which means that we have rejected our null hypothesis and found support for our alternate hypothesis when‚ in fact‚ the null hypothesis was true. • What is your null hypothesis? Alternate
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What is Hypothesis Testing? A statistical hypothesis is an assumption about a population parameter. This assumption may or may not be true. Hypothesis testing refers to the formal procedures used by statisticians to accept or reject statistical hypotheses. Statistical Hypotheses Null hypothesis. The null hypothesis‚ denoted by H0‚ is usually the hypothesis that sample observations result purely from chance. Alternative hypothesis. The alternative hypothesis‚ denoted by H1 or Ha‚ is the hypothesis
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Southwestern University Cebu City Graduate School of Health Science‚ Management and Pedagogy Statistical Methods (EDUC 201) ACTIVITY 4 HYPOTHESIS-TESTING Instruction: Apply the five steps of hypothesis-testing procedure to each problem below. 1. A researcher conducted an experiment to determine the effect of a lecturer’s age on student preferences to hear him lecture. In a regular classroom situation‚ 20 students were told that the administration wished to know their preferences regarding
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PseudoScientific Consulting‚ the time interval between Atlantic hurricane of category 4 has a mean of 456 days and a standard deviation of 123 days. Suppose that you observe a sample of five (5) time intervals between successive category 4 hurricanes. a. On average‚ what would you expect to be the mean of the five (5) time intervals? b. How much variation would you expect from your answer in part (a)? (Hint: Think along the line of the Empirical 68-95-99.7 Rule.) The following
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Hypothesis testing begins with the assumption that randomization is used to collect quantitative data about the sample and that the distribution of this data has a normal shape. Significance tests state two explanations‚ or hypotheses‚ about a parameter. One‚ called the null hypothesis‚ states that the parameter equals some value (usually 0). The other‚ called the alternative hypothesis‚ states that the parameter is greater than‚ less than or (not) equal to the value stated in the null hypothesis
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Techniques of Hypothesis Testing Dr. Scott Stevens Objectives When you finish reading this article‚ you should be able to • Determine the appropriate null and alternate hypotheses for your hypothesis test • Determine if your test is one- or two- tailed • Conduct an appropriate test using Excel in any of three ways o Using the critical score approach o Using the non-rejection region approach (for a two-tailed test) o Using the P-value approach
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Erin Harvell English 2000 Professor Panos 13 April 2010 Overdiagnosis of AD(H)D in Children Disruptive behavior‚ distractibility in the classroom‚ and inability to pay attention are just a few symptoms that most children diagnosed with AD(H)D have. However‚ are these few symptoms what doctors look at when diagnosing a child for AD(HD)? More and more research is leading doctors to believe that AD(H)D is being over diagnosed because of the lack of time doctors have to spend with their patients
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Composition Proposal on ADHD Medicating Young Children with ADHD Problem: Is it a good or bad idea to put children under the adolescent age on medication for ADHD? Solution: It all depends on the parents and severity of the problem Possible Sources: www.adhdtreatmentforkids.com www.additudemag.com/ADHDTreatment/TreatingChildren www.pbs.org/wgbh/pages/frontline/shows/medicating/drugs/ www.addadhdblog.com/adhd-medication-for-3-4-and-5-year-olds/
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Should Toddlers Diagnosed with ADHD be Medicated? More and more children under the age of 18 are being diagnosed each year with different types of behavioral conditions such as Attention Deficit Hyperactivity Disorder‚ also known as ADHD. Children with ADHD are being prescribed strong medications such as Adderall‚ Vyvanse‚ Ritalin‚ and many others. “An estimated 5% of children have a form of ADHD. More boys are diagnosed than girls; it is the leading cause of referrals to mental health professionals
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