Discrete variables are those that can only exist at certain values within a given range. For example, money is a discrete variable because you can have as much or as little money as you want, but its typically impossible to have a fraction of a cent. For example, you can't have $12.345, only $12.34 or $12.35. Weight does not fall into this category because you can essentially have any weight that's greater than 0. You could weight 1 pound, 1.000001 pound, or even a trillionth of a pound! When you have data that acts in such a way, it is called a continuous variable.
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Height, weight, wavelength of light.
No. Because blood pressure is continuous variable. Like temperature, a person's weight and height, the measured value occurs over a continuous scale.
1.14
It is a discrete random variable.