If t is a t-distributed random variable with 20 degrees of freedom, then P(-1.325 < t < 1.725) equals: 0.85 O 0.05 O 0.95 Unknown given the information provided. +

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A:

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A: ∫33361+x2dx=6∫33311+x2dx=6tan-1x333=6tan-13-tan-133=6tan-13-tan-113=6π3-π6=2π-π=π

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A:

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A: