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deff fn [24]
3 years ago
13

X and Y are independent random variables. X is normally distributed with mean 1 and variance 1. Y is normally distributed with m

ean 3 and variance 5. What is the variance of Y - 2X?
Mathematics
1 answer:
g100num [7]3 years ago
8 0

Answer:

1

Step-by-step explanation:

Equation of variance:

Total Variance = sum (i=1, N) {c^2,variance^2}

= c1^2*variance1^2 + c2^2*variance2^2 + .....

Variance of X = 1

Variance of Y = 5

Variance of Y - 2X = (1^2)*(5) - (2^2)**(1)

= 5 - 4 = 1

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Answer:

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The area of this rectangle is 4x^2 what does coefficient 4 mean in terms of the problem
mestny [16]

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A block of cheese is in the shape of a rectangle prism with a width of 2.5 inches in the height of 5 inches the volume of the bl
brilliants [131]
The formula for volume is l x w x h.

To find the missing link, we do the equation backwards.

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5 0
2 years ago
Read 2 more answers
Find the z score that has 70.54% of the distribution area to its right
Alik [6]

The z score that has 70.54% of the distribution area is 9.92

<h3>What is a z-score?</h3>

The z-score is a numerical measurement used in statistics to refer to how much a given value differs from the standard deviation.

For the random variable x, the z-score is;

z = (x - 11)/2

therefore, 70.54% of the area under the curve lies to the right of x,

then the area to the left of x is;

100 - 70.54 = 29.46%

From the standard table, a z-score of -0.54 will yield an area of 29.46% to the left of x.

Therefore, we get;

(x - 11)/2 = -0.54

x - 11 = -0.54(2)

x = 9.92

The z score  is 9.92

Learn more about z score here;

brainly.com/question/4167122

#SPJ1

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. If Owen buys a trampoline for $350.60, and is charged 7% sales tax, how much sales tax does he pay?
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$24.54 I hope this is the right answer
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