Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.

Complete Question

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The value is  

Step-by-step explanation:

From the question we are told that

   The number of observation is greater than 50  i.e. n > 50

   The  level of significance is  

Generally given that n >  30  then we will make use of the z table  

So  

  From the z table the critical value corresponding to the level of significance level for a two-tailed test is

13

step-by-step explanation:

distance formula is d=√(x2-x1)^2   +   (y2-y1)^2