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 calculate a test statistic of 1.8 what is the proper conclusion?
A) you do not reject Ho.
b) You would need to calculate the p-value to determine significance
C) You would need to calculate the confidence interval to determine significance.
D) you reject Ho.