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Tests of Statistical Significance

Statistical inference

Statistical Inference TRUE STATE OF AFFAIRS EFFECTIVE NOT EFFECTIVE EFFECTIVE True positive(correct) False positive(type I / alpha error) Conclusion of …

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Significance Testing and p value

Statistical inference

In inferential statistics, we use patterns in the sample data to draw inferences about the population represented, accounting for randomness. …

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Standard Error and Confidence Interval -Generalizing Results over Population

Normal distribution curve

Standard Error Standard error is the measure of extent to which the sample mean deviates from true population mean. It …

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Measures of Variablility

calculating variance and standard deviation

Central Tendency doesn’t tell us everything. Dispersion/Deviation/Spread tells us a lot about how a variable is distributed. We are most …

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Measures of Central Tendency

Normal distribution curve

The goal of measures of central tendency is to come up with the one single number that best describes a …

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Normal Distribution Curve

Normal distribution curve

Characteristics of the Normal Distribution It is symmetrical — Half the cases are to one side of the center; the …

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Biostatistics -An Introduction

Confounding variable example

Statistics is the art and science of making decisions in the face of uncertainty. Bio statistics is statistics as applied …

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Screening for Disease

Screening Cross tabulation

Screening may be defined as “The presumptive identification of unrecognized diseases or defect by  the application of tests, examinations or …

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Prevention of Sexually Transmitted Diseases

Spread of communicable disease

Sexually transmitted diseases are a group of communicable diseases that are transmitted predominantly by sexual contact. They are caused by …

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Breast Feeding -Overview and Advantages

Safe motherhood

Mothers milk is the ideal food for the infant and no other supplementation is required for the baby until 4-6 …

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