Suppose the lifetime income of all high school grads is normally distributed and that the lifetime income of all college grads is normally distributed. Suppose that the difference in the means is known to be $600,000 and that the standard deviation of the high school graduates is $300,000 and the standard deviation of the college grads is $200,000. What percent of college grads earn more in a lifetime than the highest 40% of high school grads?
Solution Preview
Assume the average income of high school grads is H, and the average income of college grads is C.
Then we know H-C =600,000
First, the highest 40% of a normal distribution has a ...
Solution Summary
Suppose the lifetime income of all high school grads is normally distributed and that the lifetime income of all college grads is normally distributed. Suppose that the difference in the means is known to be $600,000 and that the standard deviation of the high school graduates is $300,000 and the standard deviation of the college grads is $200,000. What percent of college grads earn more in a lifetime than the highest 40% of high school grads?
... a sample of 100 is taken from a population which has a normal distribution with a mean of 80 and a standard deviation of 40. What is the probability that the ...
... means that the height of the probability function can in ... the sum of all the probabilities must equal ... How would you apply the normal distribution to facilitate ...
... 25 tables, we can find the probabilities as follows. ... 0.2119 25 σ Distribution Plot Normal, Mean=0 ... B. What is the probability of randomly selecting a ...
