Scores for an exam are normally distributed with a mean of 235 and a standard deviation of 52. What is the percentile value of a score of 270? Round your score to TWO decimal places. For example, if you compute a value of .547, you would enter .55. ALSO: Please enter ONLY the value, no equals sign, no words, etc.
Solution :
Given that ,
mean = = 235
standard deviation = = 52
P(X< 270) = P[(X- ) / < (270-235) /52 ]
= P(z <0.67 )
Using z table
=0.7486
=74.86%
=74.86
Scores for an exam are normally distributed with a mean of 235 and a standard deviation...
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