In each of the following, identify the variable as discrete or not discrete. 1.

Question

In each of the following, identify the variable as discrete or not discrete. 1. T: the turnaround time for a computer job (the time it takes to run the program and receive the results). 2. M: the number of meteorites hitting a satellite per day. 3. N: the number of neutrons expelled per thermal neutron absorbed in fission of uranium-235. 4. Neutrons emitted as a result of fission are either prompt neutrons or delayed neutrons. Prompt neutrons account for about 99% of all neutrons emitted and are released within 10^-14 s of the instant of fission. Delayed neutrons are emitted over a period of several hours. Let D denote the time at which a delayed neutron is emitted in a fission reaction. 5. Electrical resistance is the opposition offered by electrical conductors to the flow of current. The unit of resistance is the ohm. For example, a 21/2-inch electric bell will usually have a resistance somewhere between 1.5 and 3 ohms. Let O denote the actual resistance of a randomly selected bell of this type. 6. The number of power failures per month in the Tennessee Valley power net-work. 7. Grafting, the uniting of the stem of one plant with the stem or root of another, is widely used commercially to grow the stem of one variety that produces fine fruit on the root system of another variety with a hardy root system. Most Florida sweet oranges grow on trees grafted to the root of a sour orange variety. The density for X, the number of grafts that fail in a series of five trials, is given by Table 3.12.

Explanation / Answer

6)its a discrete variable.

power failures only in numbers not in fractions.

for your understand see examples below.

If a variable can take on any value between two specified values, it is called a continuous variable; otherwise, it is called a discrete variable

Suppose the police department mandates that all are must weigh between 150 and 250 pounds. The weight of a police's would be an example of a continuous variable; since a policer's weight could take on any value between 150 and 250 pounds

number of goals in foot ball..0,1,2,3... but not 1.2 ,6.7 likethat.

therfore its discrete variable

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