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.
public investmentnoun. uk â us â GOVERNMENT, ECONOMICS, FINANCE. âº [ U ] the money that a government spends on public services, such as education and health: The business community fears that the economy's slow growth is inadequate to meet the nation's private and public investment needs. (Definition of âpublic investmentâ from the Cambridge Business English Dictionary Â© Cambridge University Press)