Complete the following:
1 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?
0.9974
0.3830
0.2586
0.6426
2 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?
p(450
p(425
p(402
p(490
3 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
M=56 and n=16