Mathematics, 22.06.2019 15:00 JohnnyR7057

Avideo website would like to test the hypothesis that the standard deviation for the length of an online video watched by a user is more than 2 minutes. a random sample of 21 people who watched online videos was selected. the sample standard deviation for the length of the video was found to be 2.5 minutes. what is the number of degrees of freedom for this hypothesis test?

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