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statistics

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Which of the following numbers could not
possibly be probabilities?
justify your answer

a)0.124
b)1
c)-0.1142
d)0
e)2/7
f)6/5
g)2.8

  • statistics -

    What on earth could a negative probability mean ?
    How can you have two probabilities more than 100%

  • statistics -

    Assume that the mean score on a certain aptitude test across the nation is 100, and that the standard deviation is 20 points. Find the probability that the mean aptitude test score for a randomly selected group of 150 8th graders is between 99 and 101

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