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RideAnS [48]
3 years ago
13

If LaTeX: z_{obt}z o b t= +2.21, do you reject LaTeX: H_0H 0 or fail to reject LaTeX: H_0H 0 using a one-tailed test in the uppe

r tail with α = .05? Why do you make that choice? Note: Be sure to type in the correct answer in the space provided here.
Mathematics
1 answer:
professor190 [17]3 years ago
7 0

Answer:

Reject the null hypothesis

Step-by-step explanation:

From the question we are told that

   The test statistic is  z_{obt} =  +2.21

    The level of significance is  \alpha  =  0.05

Given that this a one tailed in the upper tail then from the z table the area under the normal  curve to the right  corresponding to z_{obt} =  +2.21 is

      P( Z >  2.21) = 0.013553

So the p-value  is

       p-value  =  P( Z >  2.21) = 0.013553

From the values obtained we see that   p-value < \alpha  hence

The decision rule

 Reject the null hypothesis

     

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