decide whether a discrete or continuous random variable is the best model for ea

Question

decide whether a discrete or continuous random variable is the best model for each of the following variables 1) the sales in an eastern division in company Y. 2) the number of planes landed in a local air port last week. 3) the size of an injection molded plastic part 4) the number of molecules in a sample of gas 5) number of defective parts in a bin 6) distance traveled in between classes.
Please explain why you chose the answer.
decide whether a discrete or continuous random variable is the best model for each of the following variables 1) the sales in an eastern division in company Y. 2) the number of planes landed in a local air port last week. 3) the size of an injection molded plastic part 4) the number of molecules in a sample of gas 5) number of defective parts in a bin 6) distance traveled in between classes.
Please explain why you chose the answer.
decide whether a discrete or continuous random variable is the best model for each of the following variables 1) the sales in an eastern division in company Y. 2) the number of planes landed in a local air port last week. 3) the size of an injection molded plastic part 4) the number of molecules in a sample of gas 5) number of defective parts in a bin 6) distance traveled in between classes.
Please explain why you chose the answer.

Explanation / Answer

First of all, you have to know that you use discrete values for things that you can count and it can't have a fraccion, like people, animals, etcétera. and continous for things that you can measure, like distance, weigth, etc.

a)discrete (you can't have a half sale)

b) discrete (you can't have a half plane)

c) continuous ( is a measurement)

d) discrete (you can't have a half molecule)

e) discrete ( you have to count the parts)

f) continuous (you can have a half metter or kilometer)

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