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3 years ago

Math question down below

Mathematics

1 answer:

julsineya [31]3 years ago

6 0

This data set has no outliers, because all of the numbers are close together.

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Polly the penguins singing career has really taken off! Her one-hit-wonder "penguins just wanna have fun" has made ticket sales

NeX [460]

$75.68

If you do the math correctly, this is the right answer.
Hope this helps!☺️

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3 years ago

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What is the slope of the line that passes through (2, 2) and (10, 6) ?

MaRussiya [10]

6-2 4
10-2 8

Answer is 1/2

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3 years ago

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The state of Georgia has about 170 people per square mile. The area of Georgia is 59,425 square miles. What is the population of

Katen [24]

170x59425=10,102,250
Which is approximately 10 million, so your answer is C
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3 years ago

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Let X and Y denote the values of two stocks at the end of a five-year period. X is uniformly distributed on the interval (0, 12)

Paladinen [302]

Answer:

Cov (X,Y) = 6

Step-by-step explanation:

hello,

Cov(X,Y) = E(XY) - E(X)E(Y)

we must first find E(XY), E(X), and E(Y).

since X is uniformly distributed on the interval (0,12), then E(X) = 6.

next we find the joint density f(x,y) using the formula

$f(x,y) = g(y|x)f_{X}(x)$

$f_{X} (x) = \frac{1}{12} \ $for$\ 0$ this is because f is uniformly distributed on the the interval (0,12)

also since the conditional probability density of Y given X=x, is uniformly distributed on the interval [0,x], then

$g(y|x)=\frac{1}{x}$ for 0≤y≤x≤12

thus

$f(x,y)=\frac{1}{12x}$ .

hence,

$E(X,Y)= \int\limits^{12}_{x=0} \int\limits^x_{y=o} xy\frac{1}{12x} \,dy dx$

$E(X,Y)=\frac{!}{24} \int\limits^{12}_{x=0} x^2 \, dx = 24$

also,

$E(Y) = \int\limits^{12}_{x=0} \int\limits^x_{y=0} y\frac{1}{12x} \, dydx$

$E(Y)=\frac{1}{24}\int\limits^{12}_{x=0} {x} \, dx =3$

thus Cov(X,Y) = E(XY) - E(X)E(Y)

= 24 - (6)(3)

= 6

3 0

4 years ago

Work out the equation of a line when the gradient is 1/2 and it passes through the point (4,-2)

BaLLatris [955]

Answer:

The equation of the line is

$y = \frac{1}{2} x - 4$

Step-by-step explanation:

Equation of a line is y = mx + c

where m is the gradient

c is the y intercept

Gradient = 1/2

Equation of the line using point ( 4 , -2) is

$y + 2 = \frac{1}{2} (x - 4) \\ y + 2 = \frac{1}{2} x - 2 \\ y = \frac{1}{2} x - 2 - 2 \\ y = \frac{1}{2} x - 4$

Hope this helps you

8 0

3 years ago