Please explain how to solve. I have attempted to answer, please let me know if I'm right or wrong. Thank you!
a random sample of n=9 scores is selected from a normal distribution with u= 80 and o=12. what is the probability that the sample mean will be between 76 and 84?
* 0.6426 ( is this correct?)
a random sample of n= 16 scores is selected from a normal distribution with u= 500 and o= 200. for this sample which of the following is true?
A sample is selected from a normal population with u= 50 and o= 12. which of the following samples would be considered extreme and unrepresentative for this population?
*M=53 and n=4
*M=53 and n= 16
*M=56 and n=4 ( is this correct?)
*M=56 and n=16
1. P(76<X<84)=P((76-80)/(12/sqrt(9))<Z<(84-80)/(12/sqrt(9)))=P(-1<Z<1)=0.6426 from standard normal table
2. We know that P(-1.96<Z<1.96)=0.95. So we ...
The solution gives detailed steps on computing probability of normally distributed data and also deciding extreme samples.