Hypothesis testing I Kevin Soo Outline • • • • Theory and the research process What is a hypothesis? Hypothesis testing Statistical models Theory and the research process Theory • A belief – Can be true or false – P (belief) • A proposed/possible explanation for something – ‘Some students do poorly at statistics because they have less exposure to mathematics’ – ‘Women don’t date me because I’m ugly’ – ‘Manchester United lost the Premier League because they struggled with injury
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Null Hypothesis (McMillan‚ 2012‚ p. 49): A null hypothesis states that no significant statistical relationship or difference exists between the groups that are being compared in astudy. This term relates to all of the studies I read for my research study analyses. They all compared the academic achievement of high school athletes and non-athletes in some way or another. While the null hypotheses were not explicitly mentioned in the studies‚ they all would have been something along the lines of
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Hypothesis Statement Trees that exhibit gumming are more resistant to fusarium dieback caused by the polyphagous shot hole borer (PSHB) because the gum secreted acts as a defense against beetles that attempt to penetrate the bark‚ and as a result grant the tree faux resistance to the Fusarium euwallaceae fungi. Introduction Californian agriculture is at great risk because of a disease being spread by the Polyphagous Shot Hole Borer (PSHB)‚ Euwallacea sp. The PSHB is an ambrosia beetle
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helps us understand why various species differ from one another‚ tells us to what diseases we are predisposed‚ and enables us to produce drugs for a variety of diseases? D. Gene Question 6 Which structure can occupy up to 90% of the volume in a plant cell? Correct A. central vacuole Question 7 Which cytoskeletal fibers are found in the internal structure of the cilia and flagella? D. Microtubules Question 8 In mammalian species‚ what structure propels the movement
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“Accept” the Null Hypothesis by Keith M. Bower‚ M.S. and James A. Colton‚ M.S. Reprinted with permission from the American Society for Quality When performing statistical hypothesis tests such as a one-sample t-test or the AndersonDarling test for normality‚ an investigator will either reject or fail to reject the null hypothesis‚ based upon sampled data. Frequently‚ results in Six Sigma projects contain the verbiage “accept the null hypothesis‚” which implies that the null hypothesis has been proven
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HYPOTHESIS TESTING WHAT IS THIS HYPOTHESIS???? • In simple words it means a mere assumption or supposition to be proved of disproved. • But‚ for a researcher it is a formal question that he intends to resolve. • Example: I assume that 1) under stress and anxiety a person goes into depression. 2) It leads to aggressive behaviour. Eg. : Students who get better counselling in a university will show a greater increase in creativity than students who were not counselled. • So‚ the hypothesis
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at multiplication tables‚ so let’s get together for this test" (137)‚ yet the adult equivalent of this is seen in the workplace when teams are expected to come up with a group solution to a problem. This is an odd practice for most people‚ as well as the fact that trying to reach a consensus in a group of adults can frequently
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Statement: Is breastfeeding better for the mother’s body as well for the baby’s body? Hypothesis: That breastfeeding is better then formula for the baby’s health and development. Also‚ breastfeeding helps the mother with losing postpartum weight and bonding with her new baby. Results: Breast milk is the most complete form of nutrition for infants. Human milk contains just the right amount of fatty acids‚ lactose‚ water‚ and amino acids for human digestion‚ brain development‚ and growth. (Williams
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aim n.‚ v. air n. aircraft n. airport n. alarm n.‚ v. alarming adj. alarmed adj. alcohol n. alcoholic adj.‚ n. alive adj. all det.‚ pron.‚ adv. allow v. all right adj.‚ adv.‚ exclamation ally n.‚ v. allied adj. almost adv. alone adj.‚ adv. along prep.‚ adv. alongside prep.‚ adv. aloud adv. alphabet n. alphabetical adj. alphabetically adv. already adv. also adv. alter v. alternative n.‚ adj. alternatively adv. although conj. altogether adv. always adv.
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Hydrilla: An Invasive Species Hydrilla verticillata‚ otherwise known as Hydrilla is an aggressive water weed and is said to be one of the world’s worst invasive aquatic plants. Hydrilla in temperate places around the globe and somehow made its way to the United States. Hydrilla has a special advantage; it grows under lower light conditions than nearly any other species‚ it only needs about 1% of sunlight. This advantage allows hydrilla to grow underneath other plants and survive greater depths;
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