Using the video above! @ Time stamp (to solve 1-3 use the mean and standard deviation mentioned in the video) 1) * 6:34 The speaker converts x=250 to z=1.67 using the z-score formula. Using the z-table in back of book he determines P(X>250) = .0475. If you used the NORMALCDF(?,?,?,?) what would your answer be taken 5 decimal places (the answer is slightly different)?

2) * 7:04 The speaker determines P(250<x<350) = .0475 by using the complement rule, etc. We understand that 250 and 350 are the boundaries. Again, using NORMALCDF(?,?,?,?) what would your answer be taking 5 decimal places. 3) * 8:42 The speaker states he need to find “x” based on given the Probability, “the bottom 5%” based on 95% probability. The speaker calculates 150.5. In my lecture video I refer to this as INVNORM(?,?,?) where we are doing the opposite of what we have already done (before we were given x and were finding probability. Now we have the probability (95%) and need to find x – in essence going backwards). Take your INVNORM answer 2 decimal places.1) P(X>250) = answer should be 5 decimal places using NORMALCDF.2) P(250<x<350) = answer should be 5 decimal places. using NORMALCDF3) Given the “bottom 5% what is the value of x must take 2 decimal places?