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 does not mean that for a given realised interval calculated from sample data there is a 95% probability the population parameter lies within the interval, nor that there is a 95% probability that the interval covers the population parameter.