'1 tailed test' diaporamas de présentation

Statistics

Statistics. A Word on Statistics - Wislawa Szymborska. Led to error by youth (which passes): sixty, plus or minus. Those not to be messed with: four-and-forty. Living in constant fear of someone or something: seventy-seven. Capable of happiness: twenty-some-odd at most. Harmless alone,

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Scientific Methods 1

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Testing Hypotheses I

Testing Hypotheses I. Lesson 9. Descriptive vs. Inferential Statistics. Descriptive quantitative descriptions of characteristics Inferential Statistics Drawing conclusions about parameters ~. Hypothesis Testing. Hypothesis testable assumption about a parameter

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Review I

Review I. A student researcher obtains a random sample of UMD students and finds that 55% report using an illegally obtained stimulant to study in the past year 95% confidence level, margin of error = +/- 5%

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Concept Review

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Review: What influences confidence intervals?

Review: What influences confidence intervals?. The width of a confidence interval depends on three things ? / confidence level: The confidence level can be raised (e.g., to 99%) or lowered (e.g., to 90%)

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Statistics (AKA: Sadistics) Made Easy

Statistics (AKA: Sadistics) Made Easy. by Donna L. Agan, EdD. Show of Hands. Who is doing a study that involves statistical analysis of data? What type of (quantitative) data are you collecting?

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Statistical Inference

Statistical Inference Statistical inference is concerned with the use of sample data to make inferences about unknown population parameters. For example, suppose we have a random variable X which has a normal distribution with unknown mean and variance.

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Nuffield Free-Standing Mathematics Activity Rain or shine?

Nuffield Free-Standing Mathematics Activity Rain or shine?. Spreadsheet activity. Parents sometimes say that it rains more in August when children are not at school than it does in other summer months. Some people think Scotland is sunnier in spring than England and Wales.

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Select The After Data For Variable 1 Range Something Great /tutorialoutletdotcom

FOR MORE CLASSES VISIT www.tutorialoutlet.com Refer to the Weight Watchers file below: Use excel to test. For each paired difference, compute After - Before. In Data Analysis, t-test: Paired Two Sample for means, select the After data for Variable 1 Range. Note that the critical value output by Data Analysis for this test is always positive. In this problem, the sign of the critical value is negative corresponding to a 1-tailed test with lower reject region and negative lower critical value.

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