How to calculate error for squared data?

given the data set 50.6, 59.8, 50.9, 51.3, 51.5, 51.6, 51.8, 52.0 how do you calculate the standard error? the answer is found to be (along with average wave speed) (51.3 +/- 0.2)m/s the 0.2 is the standard error, but i have no idea how u get it. any...

Hi, Let's say you have a data set were observations are scattered in a way it is very visible the observations adhere to two different regimes. That is, the first X observations can be fitted with one linear regression very well, and the other observations...

QUESTION: dear sir: Recently i engage in share business. Merchant banks in our country provides loan against securities of those companies which have P/E(price-earning ratio) less than 40. There are lots of companies against which loans are not given...

The records of pelletier company shpw the following data: 2006; 2007; 2008; Sales 300,000 312,000 324,000 Beginning Inventory 25,000 17,000 29,000 Cost Of Goods Purchased 250,000 285,000 245,000 Ending Inventory 17,000 29,000 35,000 Operating Expenses...

The context is this: We are wanting to create a model to predict outcomes for subjects who get training.  It is known that an historical group of subjects got training and another did not, (T,t).  The training was supposed to assist the members in passing...

A statistics / scientific convention question. I've noticed in scientific journals that often when a set of data is presented with values normalized to one of the sample groups, and the value for that sample group is arbitrarily set to 1, 10, 100 or...