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The GRE is an entrance exam that many students are required to take in order to apply to graduate school. In 2014, the combined scores for the Verbal and Quantitative sections were approximately normally distributed with a mean of 310 and a standard deviation of 12. {nl} {nl} What is the probability that a randomly selected score is greater than 334? Write your answer as a decimal

 Jan 20, 2017
edited by Guest  Jan 20, 2017
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You'll have to refer back to that diagram I asked you to commit to memory......look at it.    334 is TWO DEVIATIONS above the mean (the TOP of the curve)......how many per centage points are above this ????   Look at the bottom of the graph.....there are only two more percentages entered at TWO deviations ABOVE the mean.....see them?????   Those two added together are all of the scores that are above 334 (which is two standard deviations above 310 ---the top of the curve)

 

 

 

Got it????

 

 Jan 20, 2017

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