STATISTICAL TECHNIQUES AND TOOLS
TESTS OF SIGNIFICANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What does it mean when a test is statistically significant?
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it has reached alpha level status
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the test statistic had a P-value higher than the alpha level
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the test statistic had a P-value lower than the alpha level
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it is important in practical terms
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Explanation:
Detailed explanation-1: -The p-value measures the probability of getting a more extreme value than the one you got from the experiment. If the p-value is greater than alpha, you accept the null hypothesis. If it is less than alpha, you reject the null hypothesis.
Detailed explanation-2: -What Is Statistical Significance? “Statistical significance helps quantify whether a result is likely due to chance or to some factor of interest, ‘’ says Redman. When a finding is significant, it simply means you can feel confident that’s it real, not that you just got lucky (or unlucky) in choosing the sample.
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