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Ok well the chart says its 0.0003.
I see how you got those numbers when i use your calculator, but we have to use the table in my class... so how would i go about this problem with the table? I'm not understanding what to do with the numbers you gave me from the online calculator...
Don't you look at Table A to find it?
Ok, so my new math teacher isn't teaching our class anything and I could really use some help with the breakdown (with step by step instructions to help me understand how do work these problems in the future) of these problems . I'm not sure what formulas to use and when. Please help with this problem to start with!!
The breaking strength of untreated fabric is Normally distributed with mean 58 pounds and standard deviation 2.3 pounds. The same type of fabric after treatment has Normally distributed breaking strength with mean 30 pounds and standard deviation 1.6 pounds. A clothing manufacturer tests an SRS of 5 specimens of each fabric.
a) What is the probability that the mean breaking strength of the 5 untreated specimens exceeds 50 pounds?
b) What is the probability that the mean breaking strength of the 5 treated specimens exceeds 50 pounds?
No, thats all the problem said. Just to simplify it..
Oh, ok i see
Pretend like I dont have to do it!!
log7 7^5.04
Thanks!!
Kind of. We only went over it for a few minutes. Do you have to complete the square to finish the problem?
ok I see. Thanks! So to answer the question the width would be square root 5543 - 17 / 2 ?
Ok I got:
-17/2 + 1 square root 5543/ 2
Thanks bobby i get it now. I'll post what i got for the last one that you were helping me with, not sure that its right though..
I'm not sure how to solve this problem. Log 8 (x) = -2/3
I got 8^-2/3=x but i cant remember how to solve for X
(i square root 2)^3
so you cant reduce the 2 and 4?
So is the answer something like: 17/2 + 1/2 square root 5543/4 or maybe 17/2 + 1 square root 5543/2?
right and thats where i got stuck. Thanks for your help, i'll keep trying.
ok i did that and got what i posted earlier as -34+/- square root 22172 / 4. And i dont know what to do now..
right, thats what i got, then I used the quadratic to get X= -34 +/- square root (34)^2 - 4(2)(-2627) / 2(2), but i dont know what to do from here.
X= -34 +/- square root (34)^2 - 4(2)(-2627) / 2(2)
I tried the quadratic but it doesnt seem right to me... I think i messed up somewhere. I got -34+/- square root 22172 / 4. I dont know what to do for there..
Thanks for you help guys. I just cant solve it. I'll keep trying
Thanks mathsyperson but i still dont think i'm understanding it...