SOLUTION: A statistical analysis of 1000 long distance calls made from the headquarter of Microsoft Corporations indicates that length of these calls is normally distributed with mean 240 se

Question 1107735: A statistical analysis of 1000 long distance calls made from the headquarter of Microsoft Corporations indicates that length of these calls is normally distributed with mean 240 seconds and standard deviations 50 seconds. What is the probability that a call lasted less than 185 seconds?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
we calculate the z-score for 185 seconds
:
z-score = (185 - 240) / 50 = -1.1
:
lookup the z-score in the normal distribution z-table of values to find the associated probability
:
Probability (X < 185) = 0.1357
:

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