basic stat psychology
it covers z tests and inferential statistics
conduct a z-test
show work so i can understand
a professor has been teaching statistics for many years. his records show that the overall mean for the final exam scores is 82 with a standard deviation of 10. the professor believes that this year’s class is superior to his previous ones. the mean for the final exam scores for this year’s class of 65 students is 86.
a. should a one-tailed or two-tailed test be used?
b. state your null hypothesis
c. state your alternative hypothesis
d. what is the z-obtained?
e. what is the p value?
f. did you reject or fail to reject the null hypothesis?
g. what can you conclude on the basis of the results?
(make sure to show your work! )
& & & it eligible writing. you!