a researcher conducts a hypothesis test to evaluate the effect of the treatment. the hypothesis test produces a z-score of z= 2.75. Assuming that the researcher is using a two-tailed test,what decision should be made?
this is the two tailed test .
Test statistic = z=2.75
P(z >2.75 ) = 1 - P(z < 2.75 ) = 1-0.9970=0.0030 using z table
P-value = 2*0.0030=0.0060
Reject the null hypothesis .
fail to Reject the null hypothesis .
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