SOLUTION: Variable A is normally distributed with μ = 12.30 and σ = 3.11. What is the probability that a randomly selected case will have a score of less than 14?
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Question 1028562: Variable A is normally distributed with μ = 12.30 and σ = 3.11. What is the probability that a randomly selected case will have a score of less than 14?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
we need to calculate the z-value and then consult the tables of z-values
:
z-value = (X - mean) / standard deviation
:
z-value = (14 - 12.30) / 3.11 = 0.546623794 approx 0.55
:
the corresponding probability is 0.7088
:
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Probability (X < 14) is 0.7088
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