5
(Choose 1 answer)
The principal randomly selected six students to take an aptitude test. Their scores were:
Let t0.05.52.02
77.9 89.1 80.7 78.6 74.4 82.0
Determine a 90% confidence interval for the mean score for all students. Assume that the population has a normal distribution.
A. (76.26; 84.64)
Β. (84.64, 76.26)
C. None of the other choices is correct
D. (84.54; 76.36)
Ε. (76.35; 84.55)
Finish
