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Calculating the sample z-score

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Reference no: EM132483613

Sample z-score: - 2.56

For an alpha level of 0.05, the z-score used as critical regions would be z= +/- 1.96.

An alpha level of 0.01 would have cut off at z= +/-2.58

An alpha level of .001 would have a critical region at z = +/- 3.29.

  1. Does the sample z-score exceed the cutoff for p < .05? Based on your answer, what conclusion do you reach about the null hypothesis (reject or fail to reject)?
  2. Does the sample z-score exceed the cutoff for p < .01? Based on your answer, what conclusion do you reach about the null hypothesis (reject or fail to reject)?
  3. Does the sample z-score exceed the cutoff for p < .001? Based on your answer, what conclusion do you reach about the null hypothesis (reject or fail to reject)?

Reference no: EM132483613

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