Hypothesis Testing I Pat Obi What is a “Hypothesis?” A statement or claim about the value of a population parameter: μ‚ σ2‚ p Pat Obi‚ Purdue University Calumet 2 Decision Rule 1. x 0 Z s n Compare calculated Z value to Z value from Table (critical Z value) Reject H0 if calculated Z value lies in the rejection/significance region (i.e. region) ALTERNATIVELY: 2. Compare p-value to Reject H0 if p-value < Pat Obi‚ Purdue University Calumet 3 Two-Tail Test Ex: H0: 0
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INTRODUCTION Sodium hypochlorite is considered one of the most efficient irrigant in endodontics 1-4. Due to its antimicrobial‚ tissue dissolving properties and low cost‚ it is one of the most widely accepted irrigant in Endodontic practice 5-8. Sodium hypochlorite as a solution is relatively an unstable compound. On exposure to organic compounds‚ heat‚ light‚ air and metals‚ the available chlorine ions reduce and there is subsequent loss of tissue dissolving and antimicrobial properties 9-10. Recent
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Sodium Zeolite Softening Introduction Cation Exchanger Bead + + + + + - -+ -+ + + + + -+ + + - -+ -+ + - + + -+ Ion exchange is the process in which materials exchange one ion for another‚ hold it temporarily‚ and release it to a regenerating solution. These materials are widely used to treat raw water supplies that contain dissolved salts. Today‚ the most commonly used material is an ion exchange resin. Resins are plastic beads to which a favorable
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Chapter-11 Testing of Hypothesis: (Non-parametric Tests) Chapter-11: Testing of Hypothesis - (Non-parametric Tests) 2 11.1. Chi - square ( χ )Test / Distribution 2 11.1.1. Meaning of Chi - square ( χ )Test 2 11.1.2. Characteristics of Chi - square ( χ )Test 2 11.2. Types of Chi - square ( χ )Test / Distribution 2 11.2.1. Chi - square ( χ )Test for Population Variance 2 11.2.2. Chi - square ( χ )Test for Goodness-of-Fit 2 11.2.3. Chi - square ( χ )Test or Independence
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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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Photosynthesis Lab Report Introduction The lights are essential for photosynthesis and it plays a major role. All the food we eat and all the fossil fuel we use is a product of photosynthesis‚ which is the process that converts energy in sunlight to chemical forms of energy that can be used by biological systems. Photosynthesis is carried out by many different organisms but usually by plants and algae. All these organisms convert CO2 (carbon dioxide)
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product of photosynthesis‚ which is the process that converts energy in sunlight to chemical forms of energy that can be used by biological systems2. Many organisms are not able to use the energy obtained from sunlight directly; however‚ plants are able to use this energy and convert it into chemical energy by converting CO2 (carbon dioxide) and H2O (water) to organic materials3. The energy source for photosynthesis comes from sunlight‚ which allows for the fuel that drives photosynthesis. This process
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“Investigate how light and darkness contribute to the cycling of carbon through both cellular respiration and photosynthesis of a plant” we devised a hypothesis that states‚ If we place the two test tube‚ one with carbonated water and the other regular water‚ with the Elodea inside a dark environment it will perform cellular respiration as it will not receive enough light energy to perform photosynthesis. From the result of our experiment we found that the test tube with tap water and Elodea changed from
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2. An aqueous solution of KCl is colorless‚ KMnO4 is purple‚ and K2Cr2O7 is orange. What color would you expect of an aqueous solution of Na2Cr2O7? Explain. Orange. 3. Explain why hexane will dissolve benzene but will not dissolve sodium chloride. Sodium chloride is an ionic compound. 4. Some drinks like tea are consumed hot or cold‚ whereas others like Coca-Cola are consumed only cold. Why? For taste reasons‚ these drinks can be drunk if the user likes It but having coca cola like tea
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Photosynthesis and the Amount of Light _______________________________________________________________________ I. Introduction Photosynthesis the process where plants use sunlight (energy) to synthesize foods forming the products carbohydrates and water (H20 + CO2 + Light CH2O + O2). For photosynthesis to take place they need water‚ carbon dioxide and light and chloroplasts. Light is absorbed inside he thylakoid
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