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The test statistic of z = -2.26 is obtained when testing the claim that p=4/7 a. Using a significance level of a = 0.01, find the critical value(s) b. Should we reject He or should we fail to reject Ho? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. The critical value(s) is/are z = (Round to two decimal places as needed. Use a comma to separate answers as needed.)