Mean = 40 and Sd = 10
Need to find the value of m for the area given:
From left to right the normal dist has an area of 0.97
How do I find this?
This is what I did, normalcdf (-100,-3) = 0.00135
(Put -100 as some big number [Should be infinity])
then add to 0.97 = 0.97135, then I used invNorm (0.97135)
Don't know where I went wrong! What is the mean and sd for in this question O.o?
The answer is 58.81 but I cant get it
Please help!
You have to understand what the output from technology means. Otherwise the technology is useless.
In this case the technology is giving you a z-value which you have to convert into an x-value in the way I have already explained. Furthermore, you need to know which of invNorm(0.97) or invNorm(0.03) will give you the correct z-value.