LIN305H1 Study Guide - Midterm Guide: Box Plot, Wilcoxon Signed-Rank Test, Type I And Type Ii Errors
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In perfect normal distribution; the mean, median, and mode coincide. Ha: two measurements are not the same. (non-directional ) Ha: one measurement is greater than the other. Ha: the data are not normally distributed; w 1. Compute test statistic, w and p-value. p-value <0. 05 reject null hypothesis. **type i error (alpha): probability that reject the null, but it is in fact true. **type ii error (beta): probability that accept the null, but it is in fact false. Compute test statistic f, degrees of freedom, and p-value. * t-value) t-value = number of standard deviations. Properties of the sample to figure out the expected range for the mean in the population. Standard error (standard deviation in the distribution of means): sd/sqrt(n) Compare the means of the two independent samples. H0: the mean of the two samples are the same. They are drawn from the same population. Ha: the means of the two samples are different.
