SOLUTION: 13. State whether the standardized test statistic z indicates that you should reject the null hypothesis. a. z = 1.211 b. z = 1.305 c. z = �1.113 d. z = �1.497

Question 875272: 13. State whether the standardized test statistic z indicates that you should reject the null hypothesis.
a. z = 1.211
b. z = 1.305
c. z = �1.113
d. z = �1.497

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Below: z = 0, z = � 1, z= �2 , z= �3 are plotted.
Note: z = 0 (x value: the mean) 50% of the area under the curve is to the left and %50 to the right

One tailed or 2-tailed, z has to generally be beyond z = -2 or 2
to reject the Null Hypothesis depending on the confidence interval
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