A two-tail test is a test in which a null hypothesis can be rejected by an extreme result occurring in only one direction.
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Q. 2The sign test may be applied to a hypothesis test dealing with the median difference between independent data that result from two independent samples.
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Q. 3Using the standard normal curve, the z-score representing the 95th percentile is 1.645.
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Q. 4In a one-tailed test, the p-value is found to be equal to 0.036 . If the test had been two-tailed, the p-value would have been 0.072.
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Q. 5The sign test is always a two-tailed test.
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Q. 6The z-score representing the 10th percentile of the standard normal curve is -1.28.
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Q. 7Reducing the probability of a Type I error also reduces the probability of a Type II error.
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Q. 8The sign test can be used when the null hypothesis to be tested concerns the value of the population median.
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Q. 9Using the standard normal curve, the area between z = 1.50 and z = 1.50 is 0.4332.
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