Posters won't respond to offers of cash. If you list specifically what you want to know they will answer your questions if they know it.
I am doing a survey as part of my MSc project and need someone to review the protocol from a stats point of view, including helping to determine the sample size I need, helping with data analysis etc. Any one who is Stats graduate and can help with my study please? £50 voucher of your choice on completion of the project. Many thanks!
Posters won't respond to offers of cash. If you list specifically what you want to know they will answer your questions if they know it.
"Very few theories have been abandoned because they were found to be invalid on the basis of empirical evidence...." Spanos, 1995
http://www.youtube.com/watch?v=6ktvE2vfxSQ&t=90
I'll take any money if he's giving it away.
Last edited by Injektilo; 08-11-2014 at 04:50 PM.
haha last response was funny.
1. How on earth do I work out my sample size? I found a calculator online but I got stuck when it asked me to input the confidence interval!
2. Once the questionnaires come in, what software is available to help me analyse the data. Is there free software for this?
1. Put in 95%, as that is the norm.
2. Yes, but you'll likely need some time to get acquainted with it. If it's very simple stuff, Excel will suffice. Otherwise, you may have to look at PSPP (an freeware version of SPSS), or if you dare, R.
Excel does t-tests. A t-test is one of the most basic tests around.
I don't have emotions and sometimes that makes me very sad.
brownbabygirl (08-12-2014)
@brownbabygirl,
You do the right thing in that you want to get in touch with and talk to a statistician. You also do it right in that you show a willingness to pay for the service the statistician can do for you. (A messy study can be changed to a clear cut study, if planned correct from the start.) If you, your supervisor and your department start a long run cooperation with a statistician, that can turn out to be one of the best investments you have ever made.
Although £50 might be a lot for a student, it is not very much as a consultancy fee. How much would you have to pay for a craftsman for a few hours of work in your country? At TalkStats we usually don't take money.
Sample size?
One way is to use "mean +/- margin of error" like in:
mean +/- 2*s/sqrt(n)
where s is the standard deviation and n is the sample size. Guess a value of s. Increase n until the margin of error is acceptable small.
Good luck!
brownbabygirl (08-15-2014)
fees that the stats consultancy are looking for made my eyes water. it is actually much more than the fees for the masters lol. there is a formula online but i dont want to risk it but i might need to. i may be making a bigger issue of this that necessary
What is it that you find difficult?Sample size?
One way is to use "mean +/- margin of error" like in:
mean +/- 2*s/sqrt(n)
where s is the standard deviation and n is the sample size. Guess a value of s. Increase n until the margin of error is acceptable small.
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