3. Comparing the t and the z statistics You can use both the t statistic and the z statistic to test hypotheses about the mean of population. The test that uses the t statistic is typically referred to as a t test, while the test that uses z statistic is commonly called a z test. Which of the following statements are true of thet statistic? Check all that apply. O The t statistic provides an excellent estimate of z, particularly with small sample sizes. O The formula for the t statistic is t = (M - p) / oM. O The t statistic does not require any knowledge of the population standard deviation. O The t statistic uses the same formula as the z statistic except that the t statistic uses the estimated standard error in the denominator. O O OO

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