19) Using the z table, find the critical value (or values) for an a = 0.12 right-tailed test. ID: BESB8e 8.1.4-3+ 20) A grocery store owner claims that the mean amount spent per checkout is more than $71. A test is made of H: =71 versus H,: g > 71. The null hypothesis is rejected. State the appropriate conclusion. A) The mean checkout amount is less than or equal to $71. B) There is not enough evidence to conclude that the mean checkout price is greater than $71. C) The mean checkout amount is greater than $71. D) There is not enough evidence to conclude that the mean checkout price is less than or equal to $71. ID: BESB8e 8.1.5-4+ 21) A test is made of H;: 4= 59 versus H: 4> 59. A sample of size n = 64 is drawn, and X = 63. The population standard deviation is = 22. Compute the value of the test statistic z and determine if H is rejected at the a = 0.01 level. ID: BESB8e 8.2.5-1