SOLUTION: It is known that the mark in jamb in a particular year were normally distributed with mean 60 and standard deviation 5. If Musa score 67 , what is the percentage of all the candida
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Question 1145054: It is known that the mark in jamb in a particular year were normally distributed with mean 60 and standard deviation 5. If Musa score 67 , what is the percentage of all the candidates that scored higher than Musa ?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
Probability(P) (X > 67) = 1 - P(X < 67)
:
z-score(67) = (67 - 60)/5 = 1.4
:
P(X < 67) is the probability associated with a z-score of 1.4, find it by checking the table of z-scores
:
P(X < 67) = 0.9192
:
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P(X > 67) = 1 - 0.9192 = 0.0808
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