Recent content by FrostScYthe

Any particular reason why excel uses a different formula? Ted.

Intel Xeon X5260 / 3.33 GHz processor I am not sure if it's 3.33 GHz per processor or all processors amount to 3.33 GHz? Ted.

Hi everyone, I'm using the following formula to calculate sample skewness: g_1 = \frac{m_3}{m_2^{3/2}} = \frac{\tfrac{1}{n} \sum_{i=1}^n (x_i-\overline{x})^3}{\left(\tfrac{1}{n} \sum_{i=1}^n (x_i-\overline{x})^2\right)^{3/2}}\ , However, when I try excel on to calculate skewness I...

Hi everyone, I'm using the following formula to calculate skewness g_1 = \frac{m_3}{m_2^{3/2}} = \frac{\tfrac{1}{n} \sum_{i=1}^n (x_i-\overline{x})^3}{\left(\tfrac{1}{n} \sum_{i=1}^n (x_i-\overline{x})^2\right)^{3/2}}\ , However, when I try excel on to calculate skewness I...

Thank EnumaElish for clarifying that for me :).

Looking at this test more carefully. This test is more for testing whether a sample comes from a population that is not normally distributed. I mean if the p > alpha then you can't reject the probability that it might be Normal (but it is just a probability, it doesn't tell you how probable...

But I can reject Set 1, if I chose an alpha like 20% right?

Hi everyone, I need to make sure that I'm interpreting the Shapiro WIlk test correctly. This is how I'm doing the interpretations: Set 1 CI = 95% n = 15 Shapiro W = .92 p = .171 I think this set is distributed normally because p is the probability that it is not normal, so the...

Hi everyone, My computer fan keeps turning on fast, and then turning off (I think it's the fan, I'm not sure). The computer didn't seem to do that before. I was wondering if this is a bad sign (overheating?), and what should I check? Ed.

This is probably a dumb question, but I was asked to get a measurement in percentage between 2 linear equations with different slopes. I have the following linear equations y1 = 450463x + 50000 y2 = 668453x + 100000 Can I determine a constant difference between them, in terms of A is...

Thanks for the advice. I was also wondering: how can I check that a statement is actually valid.. something yells parser.. but i don't know how to implement this. I wonder does someone know of a simple parser for adding and substracting implemented in C++, or a way to do this easilly...

Cool, that has worked great so far, but what If I want to make sure that the string I am tokenizing has a matching set of parenthesis. boost::regex re("\\&|\\||\\(|\\)|\\w+"); boost::sregex_token_iterator p(s.begin( ), s.end( ), re); boost::sregex_token_iterator end;

Hi everyone, I'm seeking some advice on how to approach this problem, I have a query that I need to tokenize. Here are a couple of examples (animal cat & food meat) | (animal cow) into the following array: [ ( ][ animal ][ cat ][ & ][ food ][ meat ][ ) ][ | ][ ( ][ animal ][ cow ][ ) ] - I...

Hi guys.. I was wondering are all waves periodical? I mean is periodicity an intrinsic characteristic of a wave? Thanks, Ed.

I analyzed this further, and I don't know if maybe someone knows what could be happening. With the previous program I was sending a query inserting rows to a table in MySQL, row by row (each row gets an insert query), and on the latest version I created an insert query with 500 rows. There is no...