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Hypothesis testing

Chapter 11 Test written for Practice of Statistics (Yates, Starnes and Moore) 4th edition

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Statistics
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Statistical tests
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P-value
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Student's t-test
Goodness of fit
F-test

Honors Statistics: Chapter 11 Test name___________________ Multiple Choice 1. From experience, the owner of an ice-cream shop has found that 60% of all sales of ice-cream cones are for one-scoop cones, 30% are for two-scoop cones, and the remaining 10% are for three-scoop cones. Recently, the shop added frozen-yogurt cones to its menu. A random sample of 250 sales of frozen-yogurt cones revealed the following distribution: The owner wishes to know whether the pattern of sales for frozen-yogurt cones differs from that of ice-cream cones. In a goodness-of-fit test based on the ?2 distribution, the expected count for "number of two-scoop frozen-yogurt cone sales" would be A. 84. B. 75. C. 83.33.

Chapter 19 Powerpoint Outline

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Statistics
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AP Stats

Stats: Modeling the World Chapter 19 Confidence Intervals for Proportions Making an educated guess? Rarely do we actually know information about our population. Usually we: - take a sample - find a sample statistic - make a guess about the true parameter value Our guess will be a bit off, this is the idea of a confidence interval. The sample proportion ? Recall from Chapter 18 that the sampling distribution model of ? is centered at p, with standard deviation . Since we don?t know p, we can?t find the true standard deviation of the sampling distribution model, so we need to find the standard error: The Empirical Rule Revisited? By the 68-95-99.7% Rule, we know - about 68% of all samples will have ? ?s within 1 SE of p

Environmental Sceince Voc.

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Environmental Science
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Environmental Science Voc. Mrs. Potts Conservationist- a person who limits there usage of resources for future generations Economist- a person who doesn?t care about protecting the environment and lives for today Preservationist- a person who chooses not to do anything to damage the environment Experiment - a recorded way to test a hypothesis Meniscus ? the bubble of fluids measured from the bottom of meniscus (eye level) Hypothesis ? educated guess Inference- to take data and create a hypothesis Analyze- to decipher out what data means Data- recorded information about experiment Pipette ? a tool used to take samples also used to measure fluids Conclusion ? end result from testing and analyzing Turbid ? dirty cloudy water EPA ? Environmental Protection Agency

Environmental Sceince Voc.

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Environmental Science
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Science
Design of experiments
Statistics
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Hypothesis testing
Statistical inference
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Statistical hypothesis testing
Experiment
Attachment theory
Hypothesis
Environment
Technology

Environmental Science Voc. Mrs. Potts Conservationist- a person who limits there usage of resources for future generations Economist- a person who doesn?t care about protecting the environment and lives for today Preservationist- a person who chooses not to do anything to damage the environment Experiment - a recorded way to test a hypothesis Meniscus ? the bubble of fluids measured from the bottom of meniscus (eye level) Hypothesis ? educated guess Inference- to take data and create a hypothesis Analyze- to decipher out what data means Data- recorded information about experiment Pipette ? a tool used to take samples also used to measure fluids Conclusion ? end result from testing and analyzing Turbid ? dirty cloudy water EPA ? Environmental Protection Agency

Scientific Method Outline

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Biology
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Scientific Method Outline

Scientific method - processes by which scientists conduct investigations * There is no one "scientific method". Scientists actually use a variety of techniques to learn more about the world around us. However, many experimental studies would recognize the following steps: A. Statement of the problem B. Hypothesis formation - An "educated guess" C. Experiment 1. experimental group 2. control group D. Collection of data E. Analysis of results F. Conclusion - Reject or accept the hypothesis G. Communication of findings * Considerations pertaining to the scientific method: A. Hypothesis must be testable B. Sample size must be sufficiently large C. Experiment must have proper controls D. Experiment must be reproducible
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