Depending on the statement of the original problem, the equal sign may be in the null hypothesis or the alternative hypothesis.
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Q. 2Suppose the standard deviation for a given sample is known to be 12 . If each data value in the sample is multiplied by 3, the standard deviation will be 36.
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Q. 3The alternative hypothesis, sometimes referred to as the research hypothesis, is supported by using the sample evidence to contradict the null hypothesis.
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Q. 4For any distribution, the standard deviation is a measure of variability of the data around the median.
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Q. 5If our decision in a hypothesis test is to fail to reject the null hypothesis, then we know that the null hypothesis must be true.
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Q. 6One of the advantages of the standard deviation over the variance as a measure of variability is that the standard deviation is measured in the original units.
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Q. 7When we reject the null hypothesis, we are certain that the null hypothesis is false.
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