A random variable Y is normally distributed with a mean of 200 and a standard deviation of 10.
Quantity A : The probability of the event that the value of Y is greater than 220
Quantity B : 1/6
Quantity A is greater., Quantity B is greater., The two quantities are equal., The relationship cannot be determined from the information given.
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Newaz Sharif
It will be at number 9, there is little back and in number of math and so confused.
Thanks for letting us know, Tuhin! I've made a note to our content editors that this question and video correspond to #9 of the OG, so that this can be fixed :) Thanks again!
Basic knowledge of Standard Deviation is something that you will need to know for GRE Quant. The percents that Chris talks about in the video are part of the foundational knowledge that you will need for the test.
To learn more about standard deviation, I recommend reading through these resources. They will explain the concept and talk about where these percents come from.
3 Explanations