Mathematics

Associated with Math.SE; for both general discussion & math qu...
Sep 2, 2018 21:48
mary, I cant read that, sry
Sep 2, 2018 21:21
but thats just me
Sep 2, 2018 21:21
also, I think the z-score formula looks a lot like the formula for a derivative in limit form with z being in respect to the derivative, and h = to the std dev
Sep 2, 2018 21:11
Im not sure if this is a z-test or test one mean
Sep 2, 2018 21:10
so, I have x-bar = 18472.9, and an s^2 of 41.724
then I have, mu = 18470, and sigma^2 = 40.
with an alpha of 0.05
Sep 2, 2018 21:07
so i did the first part and got the sample statistics, but I dont remember which formula to use to compare them. and I know they are giving me part of the variables and expecting me to do it backward a bit to find the missing part
Sep 2, 2018 21:06
its very simple, it is a 'based on the mean and variance of a set of samples' and given a population std dev, is a stated mean for the population acceptable within a=0.05
Sep 2, 2018 21:00
I dont mind doing the work, this book just isnt very clear on which thing to do where, or rather, its too clear, too succinct.
Sep 2, 2018 20:59
could I get some help on some stats homework? I took a course before this one a few years ago and Im a bit rusty.
 

 Home Improvement

General discussion for diy.stackexchange.com
May 1, 2017 19:14
0
Q: gravel under concrete slab? is it absolutely required?

Storytellerso, I have a post-frame shed, 12x16. there are posts at 6' on the short sides and every 4' on the long side. posts are set ~18" below grade, on a 2" cap of cement over a few inches of well compacted gravel, holes were all about 27" or so, 2x6 girder runs level at the top (very level all the way a...

May 1, 2017 19:14
ok I made a topic
May 1, 2017 19:04
should I make a opic question for this?
May 1, 2017 19:04
then, pouring concrete on it
May 1, 2017 19:04
anyway, point is, I think a 5.5" slab, which is on some spongy clay with probably be fine, since its a 12x16' shed. avoid the gravel, the trouble, the labor, time etc with putting a couple inches of gravel in a shed
May 1, 2017 18:16
so I want to fill that in with concrete, I could put gravel in, say 2" and 3.5" of concrete over that
May 1, 2017 18:16
or just full 5.5" of crete
May 1, 2017 18:15
so I want to fill that in with concrete, I could put gravel in, say 2" and 3.5" of concrete over that
May 1, 2017 18:14
ok, so, basically I have ~5.5" to grade from bottom of 2x6 girder to top of board, and the Ive got posts set in concrete, at 24" from the top of that board
May 1, 2017 18:13
so, I have a post-frame shed, 12x16. there are posts at 6' on the short sides and every 4' on the long side. posts are set ~18" below grade, on a 2" cap of cement over a few inches of well compacted gravel (holes were all about 27" or so, 2x6 girder runs level at the top (very level all the way around) around base,
May 1, 2017 17:56
are any of you builders?
May 1, 2017 17:56
is it absolutely required?
May 1, 2017 17:56
gravel under concrete?
 
Nov 11, 2016 16:23
they have decided to become an obstacle to me.
Nov 11, 2016 16:23
however, I am super bummed about this phd program director person in the information science program Im trying to get into
Nov 11, 2016 16:22
super grateful for my life science innovation grad certificate program, truly top notch work
Jul 20, 2016 05:40
ciao
Jul 20, 2016 05:40
have a good night
Jul 20, 2016 05:40
and if I dont get that 'golden business grant' then I will teach, and do public service and well, work for ten years until I do
Jul 20, 2016 05:39
write for funding forthe company, try among several things Im good at the get that startup money
Jul 20, 2016 05:38
right, its the backup plan
Jul 20, 2016 05:38
money is nice, but I can build a couple houses and sell them if I want $250K to go to space for an hour
Jul 20, 2016 05:38
doing that, would be worth doing
Jul 20, 2016 05:37
but, ten years of public service
Jul 20, 2016 05:37
I could do peace corps, or do educatoinal material for a nonprofit, like homebuyer education
Jul 20, 2016 05:37
but if I do it for 10 years, they write off my loans
Jul 20, 2016 05:36
like, pennies
Jul 20, 2016 05:36
um, nothing
Jul 20, 2016 05:36
unless I hit a grant and can fund an egame or some eeg software or something for the company
Jul 20, 2016 05:35
um, I figure I will do 10 years teaching at a juco to pay off the loans
Jul 20, 2016 05:34
and try to get a few classes as an adjunct
Jul 20, 2016 05:34
as for classes taught, I need to send out applications to as many jocus as possible
Jul 20, 2016 05:33
I dont really, and clearly I need to put something togteher so I will have enough academic/intellectual merit to actually get my company/education funded (because that does count)
Jul 20, 2016 05:32
do you have a whole bunch of other stuff to list other than 'i got good grades in college so far'?
Jul 20, 2016 05:30
VP of Service in Phi Theta Kappa and member of Phi Kappa Phi
Jul 20, 2016 05:30
I put my memberships on my resume
Jul 20, 2016 05:30
are honor's society memberships and functions worth listing?
Jul 20, 2016 05:29
i put together and did the opening ceremony at a Phi Theta Kappa inauguration, donated stuff for a affle and to the Joplin tornado survivors, i went to our regionals at K State for the weekend
Jul 20, 2016 05:27
I have several essays Ive written Id like to compile and see about getting published
Jul 20, 2016 05:27
only non-fiction selection
Jul 20, 2016 05:27
I got that right before I got my Associates