A random sample of 130 students is chosen from a population of 4,500 students. If the mean IQ in the sample is 120 with a standard deviation of 5, what is the 99% confidence interval for the students' mean IQ score?

118.87−121.13

107.12−132.88

125−135

115−125

Question

A random sample of 130 students is chosen from a population of 4,500 students. If the mean IQ in the sample is 120 with a standard deviation of 5, what is the 99% confidence interval for the students' mean IQ score?

 118.87−121.13

 107.12−132.88

 125−135

 115−125

anonymous · Answer

dam you smart

anonymous · Answer

now you have reached the outer limits of my abilities
good luck with random math class

anonymous · Answer

xD its a mix of different things. this im not so sure.

anonymous · Answer

this i have no clues

aum · Answer

Look up the z-scores table for 99% confidence interval.  It is 2.576.
The 99% confidence interval = Mean - 2.576 * SD  to  Mean + 2.576 * SD 
where SD is standard deviation.
The 99% confidence interval = 120 - 2.576 * 5  to  120 + 2.576 * 5 = 
107.12 to 132.88