A statistics professor gave an exam on performing
the T-Test with σ unknown. The exam had the bonus
question "Guess the average score on this final exam. If
a T-Test is performed and the mean guess for the class is not
significantly different from the true average exam score, everyone
in the class will then receive two bonus points." There
were 10 students that took the final exam. The students'
guesses are given below. The true average exam score
was 84.5.
Use a TI-83, TI-83 Plus, or TI-84 calculator to test
whether the students should receive the two bonus
points. Identify the p-value from the calculator output,
rounding to three decimal places.
80
75
73
85
88
85
85
75
90
77