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const2013 [10]
3 years ago
8

1. All of the following are true except B. A. A random variable represents a numerical value assigned to an outcome of a probabi

lity experiment. In most applications, discrete random variables represent counted data. C. In most applications, continuous random variables represent measured data. D. The expected value of a discrete random variable is equal to the standard deviation of the random variable.
Mathematics
1 answer:
kolezko [41]3 years ago
6 0

Answer:

The true statements are :

A. A random variable is a numerical description of the outcome of a statistical experiment.

B. In most​ applications, discrete random variables represent counted​ data.

C. In most applications, continuous random variables represent measured data.

Step-by-step explanation:

It is true statement that,

A. A random variable is a numerical description of the outcome of a statistical experiment.

B. In most​ applications, discrete random variables represent counted​ data.

C. In most applications, continuous random variables represent measured data.

The false statement is -

D. The expected value of a discrete random variable is equal to the standard deviation of the random variable.

Reason -

The mean value, or expected value, of a discrete random variable X is given by the following equation:

μ = E(x) = ∑ x p(x)

And

The variance of a discrete random variable is given by the following formula:

σ²=∑ (x−μ)² P(x)

And

The square root of the variance, or, in other words, the square root of σ², is the standard deviation of a discrete random variable :

σ = √σ²

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victus00 [196]

Answer:

Choice B.

Step-by-step explanation:

In a function, each x-coordinate can only appear in one single point. In a relation, if more than one point have the same x-coordinate, it is not a function.

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Imagine a vertical line starting at the left of the graph and moving to the right.

If the line in any position intersects more than one point of the relation, then the relation is not a function.

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Start with Choice A.

A vertical line starts at the left and moves right. It intersects point (-4, 3) by itself. Then it intersects point (-2, 1) by itself. When the vertical line gets to x = -1, it intersects two points, (1, -1) and (-1, 4). This means it is not a function.

Choice B.

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3 years ago
Please help me on this
11111nata11111 [884]

Answer: 11 boxes of cards for $72

Step-by-step explanation:

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Gabriel's Equation would be

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To figure out cost, put 11 into the first equations

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Step-by-step explanation:

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Let's call :
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