Question

In: Statistics and Probability

Assignment Chapters 5 1. If you invest $1,500 and you expect the following payoffs with correlating...

Assignment Chapters 5
1. If you invest $1,500 and you expect the following payoffs with correlating probability
$300.00 .3 $1500.00 .3 $1800.00. .3 $3500.00 .1
Calculate the the Expected value, Standard deviation, and Variance of each.
2. If you invest $1,500 and you expect the following payoffs with correlating probability
$600.00 .1 $1500.00 .5 $1800.00. .2 $2500.00 .2
Calculate the the Expected value, Standard deviation, and Variance of each. Which investment would you choose? Which one is riskier?

Solutions

Expert Solution

1. Let X be the payoff from investing $1500 in investment 1

The payoff table is

x P(x)
300 0.3
1500 0.3
1800 0.3
3500 0.1

The expected value of X is

The expected value of is

The variance of X is

The standard deviation of X is

ans:

  • The expected value is $1,430.00
  • The variance is  854,100.00
  • The standard deviation is $924.1753

2. Let Y be the payoff from investing $1500 in investment 2

The payoff table is

y P(y)
600 0.1
1500 0.5
1800 0.2
2500 0.2

The expected value of Y is

The expected value of is

The variance of Y is

the standard deviation of Y is

ans:

  • The expected value is $1,670.00
  • The variance is   270,100.00  
  • The standard deviation is $519.7115

The expected value pf payoff from investment 2 is higher than from 1.

ans: We will choose investment 2 as it has a higher expected value of payoff

The standard deviation of the payoff from investment 1 is higher than investment 2 and hence it is riskier.

ans: Investment 1 is riskier as it has a higher standard deviation of payoff.


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