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I think it is hypothesis testing
Significance Level (Alpha Level): If the level is set a .05, it means the statistician is acknowledging that there is a 5% chance the results of the findings will lead them to an incorrect conclusion.
Percent means "out of 100" → 5% of 11000 = 5/100 × 11000 = 550.
percent means "out of 100" → 5% of £5.60 = 5/100 × £5.60 = £0.28
Before you ever start to work on a problem with a percent in it, stop and think what 'percent' means, and change the percent to a number that you can do arithmetic with. 'Percent' means 'hundredth'. To change a percent to a real number, either divide it by 100, or move the decimal point two places to the left. (Same thing.) 37 percent means 0.37 50 percent means 0.50 84 percent means 0.84 20.2 percent means 0.202 . 3/5 means 0.6 20.2 percent of 3/5 means (0.202 x 0.6) = 0.1212