Sketch the standard Normal curve for the test statistic and mark off areas under the curve to show why a value of z that is significant at the 1% level in a one-sided test is always significant at the 5% level. If z is significant at the 5% level, what can you say about its significance at the 1% level? A test that is significant at the 5% level is always significant at the 1% level. O It is impossible to say anything about it without more information about the data. A test that is significant at the 5% level coincides with test that is significant at the 1% level. O A test that is significant at the 5% level is not necessarily significant at the 1% level.

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