METHODS OF DATA ANALYSIS
PARAMETRIC AND NON PARAMETRIC TESTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The sample size in both the samples should not be same.
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The two samples should not be related.
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The two samples should be at least of size 50.
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Two observations are taken from the same individual-one prior to the application of treatment and other after the application of treatment.
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Detailed explanation-1: -Use a paired t-test when each subject has a pair of measurements, such as a before and after score. A paired t-test determines whether the mean change for these pairs is significantly different from zero. This test is an inferential statistics procedure because it uses samples to draw conclusions about populations.
Detailed explanation-2: -Two-sample t-test assumptions Data values must be independent. Measurements for one observation do not affect measurements for any other observation. Data in each group must be obtained via a random sample from the population. Data in each group are normally distributed.
Detailed explanation-3: -1.) Parent populations from which samples are drawn are normally distributed. 2.) The two samples are random and independent of each other.