You have just timed a person doing a job a four times. the first time it took the person 120 minutes, the second time it took 90 minutes, the third time it took 76.1 minutes, and the fourth time it took 67.5 minutes. which learning curve unit improvement factor should you use?

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

Can anyone explain to me how to do this? anything will .