Mathematics, 30.07.2019 02:10 Garrell

Find the confidence interval specified. assume that the population is normally distributed.
the principal randomly selected six students to take an aptitude test. their scores were: 81.6 72.0 81.1 86.4 70.2 83.1 determine a 90% confidence interval for the mean score for all students.
a. 84.49 to 73.65
b. 73.65 to 84.49
c. 84.39 to 73.75
d. 73.75 to 84.39

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