1. The Center for Guidance and Services conducted an IQ test in freshmen students and obtained a mean of 100 with a standard deviation of 15. What would be the probability that a randomly chosen selected 20 students will have a mean IQ of higher than 105?

2. The score of SHS students in their First Quarterly Exam in Statistics and Probability was analyzed and found to have a mean of 54.5 and standard deviation of 7.5. Find a 90% confidence interval.

3. The Aptitude Test was administered to random sample of 120 SHS students. The sample mean was 104.2 with standard deviation of 12. Find 99% confidence interval.

4. The average height of randomly chosen 45 female students was 155 cm. with standard deviation of 3.5 cm Find the 95% confidence interval.

5. The average weight of randomly selected 28 adult males was 65kigs. with standard deviation of 2.2 kgs. Find a 99% confidence interval

Answer the following problems. Show your complete solutions\

lesson: Estimation of Population Parameters