Consider the following competing hypotheses and accompanying sample data. (You may find it useful to reference the appropriate table: z table or t table) Họ: µ1 – µ2 = 5 HA: µ1 – µ2 * 5 x2 = 43 = 57 s1 = 21.5 ni = 22 s2 = 15.2 n2 = 18 Assume that the populations are normally distributed with equal variances. a-1. Calculate the value of the test statistic. (Round intermediate calculations to at least 4 decimal places and final answer to 3 decimal places.) Test statistic

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