Random variable $X sim mathcal N(m,m^2)$ question
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A random variable $X sim mathcal N(m,m^2)$ in a population, with $m in Bbb R^+$. In what percentage of the population, the variable has a positive value?.
I don't know how to start this problem, i thought it depends of the value of $m$, but apparently not.
Any hints? I never worked with a normal distribution with $mu=sigma$
random-variables normal-distribution
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
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up vote
0
down vote
favorite
A random variable $X sim mathcal N(m,m^2)$ in a population, with $m in Bbb R^+$. In what percentage of the population, the variable has a positive value?.
I don't know how to start this problem, i thought it depends of the value of $m$, but apparently not.
Any hints? I never worked with a normal distribution with $mu=sigma$
random-variables normal-distribution
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
1
They are asking about $P(X > 0).$ If you have never work with $mu = sigma,$ then assume $X sim mathrm{Norm}(mu, sigma^2)$ with $mu > 0$ and find $P(X > 0)$ (using a table) then substitute $mu = sigma = m.$
– Will M.
Nov 16 at 19:44
Thanks, i did it.
– Rodrigo Pizarro
Nov 16 at 19:55
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
A random variable $X sim mathcal N(m,m^2)$ in a population, with $m in Bbb R^+$. In what percentage of the population, the variable has a positive value?.
I don't know how to start this problem, i thought it depends of the value of $m$, but apparently not.
Any hints? I never worked with a normal distribution with $mu=sigma$
random-variables normal-distribution
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
A random variable $X sim mathcal N(m,m^2)$ in a population, with $m in Bbb R^+$. In what percentage of the population, the variable has a positive value?.
I don't know how to start this problem, i thought it depends of the value of $m$, but apparently not.
Any hints? I never worked with a normal distribution with $mu=sigma$
random-variables normal-distribution
random-variables normal-distribution
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
asked Nov 16 at 19:39
Rodrigo Pizarro
834217
834217
1
They are asking about $P(X > 0).$ If you have never work with $mu = sigma,$ then assume $X sim mathrm{Norm}(mu, sigma^2)$ with $mu > 0$ and find $P(X > 0)$ (using a table) then substitute $mu = sigma = m.$
– Will M.
Nov 16 at 19:44
Thanks, i did it.
– Rodrigo Pizarro
Nov 16 at 19:55
add a comment |
1
They are asking about $P(X > 0).$ If you have never work with $mu = sigma,$ then assume $X sim mathrm{Norm}(mu, sigma^2)$ with $mu > 0$ and find $P(X > 0)$ (using a table) then substitute $mu = sigma = m.$
– Will M.
Nov 16 at 19:44
Thanks, i did it.
– Rodrigo Pizarro
Nov 16 at 19:55
1
1
They are asking about $P(X > 0).$ If you have never work with $mu = sigma,$ then assume $X sim mathrm{Norm}(mu, sigma^2)$ with $mu > 0$ and find $P(X > 0)$ (using a table) then substitute $mu = sigma = m.$
– Will M.
Nov 16 at 19:44
They are asking about $P(X > 0).$ If you have never work with $mu = sigma,$ then assume $X sim mathrm{Norm}(mu, sigma^2)$ with $mu > 0$ and find $P(X > 0)$ (using a table) then substitute $mu = sigma = m.$
– Will M.
Nov 16 at 19:44
Thanks, i did it.
– Rodrigo Pizarro
Nov 16 at 19:55
Thanks, i did it.
– Rodrigo Pizarro
Nov 16 at 19:55
add a comment |
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1
They are asking about $P(X > 0).$ If you have never work with $mu = sigma,$ then assume $X sim mathrm{Norm}(mu, sigma^2)$ with $mu > 0$ and find $P(X > 0)$ (using a table) then substitute $mu = sigma = m.$
– Will M.
Nov 16 at 19:44
Thanks, i did it.
– Rodrigo Pizarro
Nov 16 at 19:55