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Chi-square distribution: waiting time to order. At McDonalds in Westville, waiting time to order (in minutes), Y , follows a chi-square distribution. If = 4,

Chi-square distribution: waiting time to order. At McDonalds in Westville, waiting time to order (in minutes), Y , follows a chi-square distribution.

If = 4, find the probability of waiting less than 3.9 minutes that is P(Y < 3.9)

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