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6 February, 15:11

Question 2. what is the probability that between 80 and 115 complaints are received in one week? use a n (110,20) model to approximate the distribution of weekly complaints.

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  1. 6 February, 15:40
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    Calculate standard Z values for the given dа ta:-

    z = (80 - 110) / 20 = - 3/2 = - 1.5

    and z = (115 - 110) / 20 = 0.25

    so we need Prob (-1.5 < z < 0.25)

    Using standard tables this comes to 0.5319 Answer
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