Mathematics, 06.04.2020 23:33 jsbdbdkdkkd5104

A survey conducted by a leading HMO found that of 2000 women, 340 were heavy smokers and 25 had emphysema. Of those who had emphysema, 21 were also heavy smokers. Using the data in this survey, determine whether the events being a heavy smoker and having emphysema are independent?

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