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e-lub [12.9K]
3 years ago
15

An analyst has developed the following probability distribution for the rate of return for a common stock.

Mathematics
1 answer:
evablogger [386]3 years ago
5 0

Answer:

a. E(x) = 5.2000%

b. Variance = 122.16

Standard Deviation = 11.05

Step-by-step explanation:

Given

Scenario Probability Rate of Return

1 0.20 −16 %

2 0.40 7 %

3 0.40 14 %

a.

Expected Rate of Return = E(x)

E(x) = (-16% * 0.20) + (0.40 *7%) + (0.40 * 14%)

E(x) = -3.2% + 2.8% + 5.6%

E(x) = 5.2%

E(x) = 5.2000%

b.

Variance also known as the average of the squared differences from the Mean.

To calculate variance, start by calculating the mean, or average, of your sample. Then, subtract the mean from each data point, and square the differences. Next, add up all of the squared differences

Variance =

V = σ²= (−16 − 5.2)² * 0.20 + (7 − 5.2)² * 0.40 + (14 − 5.2)² * 0.40

V = σ² =122.16

Standard Deviation = σ = √SD

σ = √122.16

σ = 11.05124427383631

σ = 11.05 --- Approximated

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A survey determined that 7/18 of the seventh grade students at Mills Middle School preferred round chocolate candies to hard can
andre [41]

Answer:

The correct answer is C) 5/18

Step-by-step explanation:

In order to find this answer, you need to take the fraction that answered it on the first try and subtract the number that changed their mind.

7/18 - 1/9

In order to complete this operation, you need to give them common denominators.

7/18 - 2/18 = 5/18


8 0
3 years ago
Pls help me, I really dont understand
Stella [2.4K]

Answer:

-2.5x-.5

y=\frac{2}{3}x-1

draw the dotted line (3/7)x-3 and shade below it

Step-by-step explanation:

First, we need the slope

Use the slope formula:

\frac{Y_2-Y_1}{X_2-x_1}=\frac{2-(-8)}{-1-3}=\frac{10}{-4}=-2.5

so we have

y= -2.5x+b

Solve for b by plugging in coordiantes

-8= -2.5(3)+b

-8= -7.5+b

b= -.5

Put it together and get -2.5x-.5

2.)

A line is parallel to another line if they have the same slope (and different y intercepts)

So in the formula y=mx+b we knowe that m= 2/3

Now it's just a matter of solving for B

plug in the required coordinate to do this

-1=(2/3)*0+b

-1= b

Put it all together to get

y=\frac{2}{3}x-1

3.)

put this into slope intercept form

3x-7y>21

3x-21 > 7y

(3/7)x-3 >y

To graph this just draw a dotted line with the equation (3/7)x-3 and shade everything below it (use de_smos if you're stuck)

7 0
4 years ago
Janna spends 1.25 hours of her 8 hour work day answering email messages. What percentage of the work day is this time
dusya [7]
1.25 divided by 8 =0.15635×100=15.6% or round up to 16%
3 0
3 years ago
A piece of wood is cut into 3 pieces in the ratio 5:4:3 if the length of the shortest piece is 2 how long is the wood
Bad White [126]

Answer:

Step-by-step explanation:

5:4:3 = x:y:2

4:3 = y:2                 Cross multiply

3y = 8                     Divide by 3

y = 8/3 = 2.66'

5/x = 3/2

3x = 10                   Divide by 3

x = 10/3

x = 3.33

Length of the wood = 2.66 + 3.33 + 2

Length of the wood = 8 feet

8 0
3 years ago
HELP WILL GIVE BRAINLIEST
Mariana [72]
On the 4th question I can’t tell if those are dots or arrows on the line above “AN” when it says “B lies on AN”, if those are 2 dots on the little line don’t check it, if they are 2 little arrows on the line then check the box, but other than that the rest of the checked are right!!

5 0
3 years ago
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