The plus-or-minus quantity .12 is called the margin of error of the sample mean associated with a 95% confidence level. It is also correct to say ``we are 95% confident that is within .12 of the sample mean 3.05''. However, .12 is a large number.
DEFINITION of 'Investing'. The act of committing money or capital to an endeavor (a business, project, real estate, etc.) with the expectation of obtaining an additional income or profit. Investing also can include the amount of time you put into the study of a prospective company, especially since time is money.
This article concerns investment in finance. In finance, investment is buying or creating an asset with the expectation of capital appreciation, dividends (profit), interest earnings, rents, or some combination of these returns. This may or may not be backed by research and analysis.n finance, investment is the purchase of an asset or item with the hope that it will generate income or appreciate in the future and be sold at the higher price. It generally does not include deposits with a bank or similar institution.