A teacher assumed that the average of grades for a math test was 80. Imagine 20 students took the test and the 95% confidence interval of grades was (83, 90). Can you reject the teacher's assumption?
a. Yes
b. No
c. We cannot tell from the given information
a. Yes
At the 0.05 significance level, yes since 80 is not in the confidence interval.
a. Yes
b. No
c. We cannot tell from the given information
a. Yes
At the 0.05 significance level, yes since 80 is not in the confidence interval.