## Parametric Tests - PowerPoint PPT Presentation

You can enter the number of transactions each day in the yellow cells in Figure 6. Learn more at: Free Report!

SlideShare Explore Search You. New Delhi: York University May 13, By testing to see if the variance of the observations comes more from the variation of each observation from the mean of its sample or from the variation of the means of the samples from the grand mean, ANOVA tests to see if the samples come from populations with equal means or not.

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Get the plugin now. You can change your ad preferences anytime. MSE - mean square due to error, measures how different the observations, within each sample, are from each other It compares only observations within the same sample Larger values correspond to more spread sample means This mean square is approximately the same as the population variance MST - mean square due to treatment, measures how different the samples are from each other It compares the different sample means Under the null hypothesis, this mean square is approximately the same as the population variance.

The F distribution is a family of curves based on the degrees of freedom of the variance of the numerator and denominator.

### Statistics in Analytical Chemistry - Tests (4)

Is there a statistically significant difference between males and females with respect to math achievement? Sultan Chand and Sons; The effect of one factor is studied through the column wise figures and total's and of the other through the row wise figures and totals. Looking for some design inspiration? It is most often used when comparing statistical models that have been fit to a data set, in order to identify the model that best fits the population from which the data were sampled.

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It is usually denoted as H o. Is the precision of one set of values better or worse than the other?

Then use the Insert Placeholder to select the type of layout you need. The third option lets you search for a color by name or number. Your presentations can now be consistent, no matter who is assigned to creating them. Please wait. First operating on the inside or second sum sign find the mean of each sample and the sum of the squares of the distances of each x in the sample from its mean.

Personal Zone. So, find the correct level of significance first, and then look up the numerator degrees of freedom and the denominator degrees of freedom to find the critical value. For purists, and occasional instances, the left-tail critical value can be computed fairly easily. If you picked one x , the source of its variance, its distance from the grand mean, would have two parts: The rest of the slides in your rundown will reflect the changes.

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