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29 October, 14:33

In a cooking contest, the mean score for taste was 20, with a standard deviation of 2.8. One of the contestants received a score of 14. Convert this score to a z score and tell if it is "usual" or "unusual."

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  1. 29 October, 15:23
    0
    Z score = n - mu / d where mu = mean and d = std dev.

    for n = 14 we hav ez score of (14-20) / 2.8 = - 2.143

    unusual as he is in the bottom 5%
  2. 29 October, 15:33
    0
    The answer is - 2.14; unusual
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