Maths p6 problem in normal and binomial distribution.. :(

[mominzahid]

Hey guys here i am again asking the same question again lol.. :/
I have a severe confusion in normal distribution and binomial distribution.. :'(
i mainly have problem identiifying when to apply continuity in conversion from binomial to normal. and this is as i've figured out mainly because i dont know the major differences b/w the normal distribution and binomial distribution.. so can someone please explain to me the major differences b/w them which help solve continuity problems..
thanks guys i have my exam day after tomorrow ur help would really mean alott..
Thanks again.....

 

[Farah1996]

when the mean/ average/ np is greater than 5, you go for normal distribution, if its less, you go for binomial --> thats one trick!
Also, when the number of trials "n" is constant and the probablity of success is constant, "p" you go for binomial

 

[mominzahid]

when the mean/ average/ np is greater than 5, you go for normal distribution, if its less, you go for binomial --> thats one trick!
Also, when the number of trials "n" is constant and the probablity of success is constant, "p" you go for binomial

somewhere in another thread a person answered this question and his words were
"it is applied when u are approximating binomial as a normal distribution.....the question will ask to use a binomial to normal approximation or if a very large number of trials are done.....then u should use normal distribution"
so my question is is this correct? i mean this looks simple enough when the keyword approximation is used in the question u apply this. is this way correct? will the examiner always use this keyword when we are expected to apply continuity correction?
thanks alott for ur helpp..

 

[Adorkableme]

somewhere in another thread a person answered this question and his words were
"it is applied when u are approximating binomial as a normal distribution.....the question will ask to use a binomial to normal approximation or if a very large number of trials are done.....then u should use normal distribution"
so my question is is this correct? i mean this looks simple enough when the keyword approximation is used in the question u apply this. is this way correct? will the examiner always use this keyword when we are expected to apply continuity correction?
thanks alott for ur helpp..

there are a few question where they ask u to use the appropriate approximation that is when u have to convert binomial to normal.
So, I guess this person is correct but they do not make it direct all the time. At times u have to figure it out.

 

[Farah1996]

somewhere in another thread a person answered this question and his words were
"it is applied when u are approximating binomial as a normal distribution.....the question will ask to use a binomial to normal approximation or if a very large number of trials are done.....then u should use normal distribution"
so my question is is this correct? i mean this looks simple enough when the keyword approximation is used in the question u apply this. is this way correct? will the examiner always use this keyword when we are expected to apply continuity correction?
thanks alott for ur helpp..

its almost always mentioned in the question, but then sometimes, you just have to figure it out, its annoying i know, and yea, the kid is right, you use the normal distribution when the number of trials are large!