Determine the critical value(s) for a two-tailed hypothesis test for a mean with the given characteristics. Round any z-value solution to two decimal places. Round any t-value solution to four decimal places. . The significance level of the test is 10% . The sample size is 45 . The population standard deviation (o) is known to be 3.1 Should the t or z distribution be used for the above scenario? The standard normal (z) distribution should be used O The Student's t distribution should be used The critical value(s) for the test are given by z v =