Nowadays, gas shielded metal arc welding (GSMAW) is widely used in various constructions. such as steel structures, bridges, autos, motorcycles, construction machinery, ships, offshore. structures, pressure vessels, and pipelines due to high welding efficiency.
A confidence interval is a range around a measurement that conveys how precise the measurement is. For most chronic disease and injury programs, the measurement in question is a proportion or a rate (the percent of New Yorkers who exercise regularly or the lung cancer incidence rate).
A 95% confidence interval is often interpreted as indicating a range within which we can be 95% certain that the true effect lies. This statement is a loose interpretation, but is useful as a rough guide.