#### What is Hypothesis Testing and it’s use?

The term “hypothesis” may make you think about science, where we investigate a hypothesis. This is along the right track. In statistics, a...

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Posted September 13, 2018
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The term “hypothesis” may make you think about science, where we investigate a hypothesis. This is along the right track. In statistics, a...

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Posted September 16, 2018
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P-Value When you perform a hypothesis test in statistics, a p-value helps you determine the significance of your results. Hypothesis tests are...

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Posted September 16, 2018
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The standard deviation of the mean (SD) is the most commonly used measure of the spread of values in a distribution. SD is calculated as the...

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Posted September 16, 2018
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Time Series This function summarises serially sampled data as the area under the time-observation or time-concentration curve (Bland 2000...

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Posted September 16, 2018
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Cross Tabulation This a two or three-way cross-tabulation function. If you have two columns of numbers that correspond to different...

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Posted September 16, 2018
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Chi-square test The two by two or fourfold contingency table represents two classifications of a set of counts or frequencies. The rows represent...

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Posted September 16, 2018
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Several proportions can be compared using a 2 by k chi-square test. For example, a random sample of people can be subdivided into k age groups and...

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Posted September 16, 2018
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R by C Contingency Table Analysis The r by c chi-square test in StatsDirect uses a number of methods to investigate two-way contingency tables...

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Posted September 16, 2018
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This function enables you to compare the distribution of classes of observations with an expected distribution. Your data must consist of a random...

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Posted September 16, 2018
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Woolf Statistics: In case-control studies, observed frequencies can often be represented by a series of two by two tables. Each stratum of this...

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Posted September 16, 2018
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Analysis_Chi-square_Mantel Haenszel; Analysis_Meta-analysis_Odds Ratio: Case-control studies of dichotomous outcomes (e.g. healed or not healed)...

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Posted September 16, 2018
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This function provides a simple linear regression and Pearson’s correlation. Regression parameters for a straight-line model (Y = a + bx)...

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