A random sample of 140 students is chosen from a population of 3,500 students. If the mean IQ in the sample is 105 with a standard deviation of 9, what is the 95% confidence interval for the students' mean IQ score?

a 100−120

b107.9−112.1

c 103.5−106.5

d108.66−111.34

Question

A random sample of 140 students is chosen from a population of 3,500 students. If the mean IQ in the sample is 105 with a standard deviation of 9, what is the 95% confidence interval for the students' mean IQ score? 

a 100−120 

 b107.9−112.1 

c 103.5−106.5 

 d108.66−111.34

anonymous · Answer

@abrahamglasser  I didn't meant to close the question

anonymous · Answer

can you go back to the old post?

anonymous · Answer

http://openstudy.com/study#/updates/52f58932e4b0512c88e5d9ac