Wouldn't the expected value for a 2-point shot be 2 points? I understand what you're getting at, but this seems like asking what color Napoleon's white horse was.

The idea ist that she will make half of her 2-point shots, scoring 2 points each, but also miss the other half, scoring 0 points each. So this, over time, will yield a result of approximately 1 point per shot.

Hi just wondering what year/s is mathematics II ? and does anyone know any helpful sites i can do a exam of mathmatics 2 ? #YouCanLearnAnything thanks

It varies, you can find it in highschool courses but it covers a wide range of topics that are in a wide range of grades like it covers both probability, geometry, and trigonometry which varies across different grade levels and courses for those respective grade levels. Sorry for the 2 year late reply but...well...better late than never, right?

how do I find expected value

expected value = value*probability

If E(X)= µ, what is E(X− µ) ?

The expected value of a difference is the difference of the expected values, and the expected value of a non-random constant is that constant. Note that E(X), i.e. the theoretical mean of X, is a non-random constant. Therefore, if E(X) = µ, we have E(X − µ) = E(X) − E(µ) = µ − µ = 0. Have a blessed, wonderful day!

Give questions worth my time to answer and that make sense to answer at all. Never in my life will i need this.

Expected values are used to decide on strategies in gambling games, determine whether or not a game is fair, test statistical hypotheses, and calculate insurance premiums. It is best to assume that the math skills that you learn will be used at some time for something in your life.

Main content

Expected value (basic)

Google Classroom

Expected value uses probability to tell us what outcomes to expect in the long run.

Problem 1: Board game spinner

A board game uses the spinner shown below to determine how many spaces a player will move forward on each turn. The probability is

\frac{1}{2}

that the player moves forward

1

space, and moving forward

2

3

spaces each have

\frac{1}{4}

probability.

What is the expected value for the number of spaces a player moves forward on a turn?
If necessary, round your answer to the nearest hundredth.

spaces

Problem 2: Basketball decisions

Kayla is a basketball player who makes

50 %

of her

2

-point shots and

20 %

of her

3

-point shots.

problem a

Find Kayla's expected value for a $2$ ‍-point shot.
If necessary, round your answer to the nearest tenth.

points

problem b

Find Kayla's expected value for a $3$ ‍-point shot.
If necessary, round your answer to the nearest tenth.

points

problem c

Which type of shot should Kayla choose to score the most points?

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Chip Mattis
Posted 7 years ago. Direct link to Chip Mattis's post “Wouldn't the expected val...”
Wouldn't the expected value for a 2-point shot be 2 points? I understand what you're getting at, but this seems like asking what color Napoleon's white horse was.
Button navigates to signup pageComment on Chip Mattis's post “Wouldn't the expected val...”
(22 votes)
Answer
- KaUh Erte
  Posted 7 years ago. Direct link to KaUh Erte's post “The idea ist that she wil...”
  The idea ist that she will make half of her 2-point shots, scoring 2 points each, but also miss the other half, scoring 0 points each. So this, over time, will yield a result of approximately 1 point per shot.
  Button navigates to signup page
  (103 votes)
bgrooms6278
Posted 7 years ago. Direct link to bgrooms6278's post “how do I find expected va...”
how do I find expected value
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(1 vote)
Answer
- Eugene Browder
  Posted 7 years ago. Direct link to Eugene Browder's post “expected value = value*pr...”
  expected value = value*probability
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  (37 votes)
HBarakzay
Posted 6 years ago. Direct link to HBarakzay's post “If E(X)= µ, what is E(X− ...”
If E(X)= µ, what is E(X− µ) ?
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(1 vote)
Answer
- Ian Pulizzotto
  Posted 6 years ago. Direct link to Ian Pulizzotto's post “The expected value of a d...”
  The expected value of a difference is the difference of the expected values, and the expected value of a non-random constant is that constant. Note that E(X), i.e. the theoretical mean of X, is a non-random constant.
  Therefore, if E(X) = µ, we have E(X − µ) = E(X) − E(µ) = µ − µ = 0.
  
  Have a blessed, wonderful day!
  Comment on Ian Pulizzotto's post “The expected value of a d...”
  (12 votes)
AlAbbas14
Posted 5 years ago. Direct link to AlAbbas14's post “Hi just wondering what ye...”
Hi just wondering what year/s is mathematics II ? and does anyone know any helpful sites i can do a exam of mathmatics 2 ?
#YouCanLearnAnything
thanks
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(3 votes)
Answer
- astro648
  Posted 2 years ago. Direct link to astro648's post “It varies, you can find i...”
  It varies, you can find it in highschool courses but it covers a wide range of topics that are in a wide range of grades like it covers both probability, geometry, and trigonometry which varies across different grade levels and courses for those respective grade levels. Sorry for the 2 year late reply but...well...better late than never, right?
  Button navigates to signup page
  (6 votes)
daniel zhang
Posted 4 years ago. Direct link to daniel zhang's post “How do you determine whet...”
How do you determine whether the odds are to your favor using the expected probability formula
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(1 vote)
Answer
Daniel Dent
Posted 4 years ago. Direct link to Daniel Dent's post “Give questions worth my t...”
Give questions worth my time to answer and that make sense to answer at all. Never in my life will i need this.
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(0 votes)
Answer
- Ian Pulizzotto
  Posted 4 years ago. Direct link to Ian Pulizzotto's post “Expected values are used ...”
  Expected values are used to decide on strategies in gambling games, determine whether or not a game is fair, test statistical hypotheses, and calculate insurance premiums.
  
  It is best to assume that the math skills that you learn will be used at some time for something in your life.
  Button navigates to signup page
  (13 votes)
Charles Hall
Posted 3 years ago. Direct link to Charles Hall's post “oh i could've scrolled do...”
oh i could've scrolled down here to get the answers the whole time, dang, missed opportunity
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(1 vote)
Answer
emilio.wendlandt
Posted 4 years ago. Direct link to emilio.wendlandt's post “I finished it and it does...”
I finished it and it does not tell me that I have it done what do I do
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(1 vote)
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e.guzman209209
Posted 3 years ago. Direct link to e.guzman209209's post “For question 1, is the sp...”
For question 1, is the spinner fair ?
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(1 vote)
Answer
Liang
Posted a year ago. Direct link to Liang's post “why the combined probabil...”
why the combined probability of 2 and 3-points are not 1?
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(1 vote)
Answer

Statistics and probability

Course: Statistics and probability > Unit 9

Expected value (basic)

Problem 1: Board game spinner

Problem 2: Basketball decisions

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