Probability Homework

The minor errors on my solution are: 68b. It should be 4x^2 e^(-2x) instead of 16. 78a. The probability is .8849 instead of .8549. 82b. The z-score should be -4/3, so the probability is 1-.0918=.9082.

Not due for a while, last collected homework before second midterm. Advise starting to work on it as we cover the various sections. Edited: 10/22 to remove the last problem because we had already proven this in class.

For 60, I also miscopied from my original solution the 3 choose 3, .05^3 .95 should be .95^0 (i.e. only three successes, no failures). The numerical answer is correct, I just left off the exponent. For 66b, on the solution I wrote .6^3 when it should be .6^4 in the pieces that are subtracted from 1. The final value there is hence off as well.

You should finish this as you study for the first midterm. We will get through all this material this week.

Moved back to Wed. due date.