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### Kurs: Statystyka - program rozszerzony>Rozdział 11

Lekcja 4: Testowanie hipotez o średniej

# Obliczanie statystyki testowej w teście t dla średniej

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St. West High School requires that students are assigned an average of $2.5$ hours of homework each night. The school board believes that the average amount of time per night is not $2.5$ hours, so they decide to take a random sample of $16$ students to see if there is convincing evidence to support their suspicion. The board finds that the sample of students were assigned an average of $2.8$ hours of homework per night with a standard deviation of $0.8$ hours.
The board want to use these sample data to conduct a $t$ test on the mean. Assume that all conditions for inference have been met.
$t=$