Trouble determining z-score. Given: sample mean = 56.7 , σ = 12.1, N = 500, and n = 47, find an 80% confidence to estimate Mu (the mean). I'm having trouble finding the z-score for an 80% confidence level.

8(4)^8=72^feet to say that the total can conclude to 8(4) which as you know would mean 8 x 4. that equals 32w. 32^ could make a 72 answer as well. but your coefficent will remain w so your answer is 72w.

you!

if you need more with your math, visit khan academy where we give videos and tutorials   on everything math. we are efficent in our work.

you,

from,

the khan academy team

additive identity property