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You have to determine that your cutoff value at level a=0.05 is 1.645 when testing whether the mean of a population is significantly different from 1.5. If you find out a test statistic of 1.8 what is the proper conclusion?

A) you do not reject Ho.
b) You would need to find out the p-value to determine significance
C) You would need to find out the confidence interval to determine significance.
D) you reject Ho.

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