Directions: Study and analyze each case. Apply the formula necessary to solve the stated problem. Show your solutions on the space provided. Use extra paper if necessary. 1. In a sample of 100 cars...

Please answer Item Number 2

Extracted text: Directions: Study and analyze each case. Apply the formula necessary to solve the stated problem. Show your solutions on the space provided. Use extra paper if necessary. 1. In a sample of 100 cars with a standard deviation of 25km/h speed. Find the margin of error if the level of confidence is 90%. 2. Mr. V wanted to know the average weight (in kilos) of students in LAO University. He took a random sample of 300 students and discovered that their average weight 55kg with a standard deviation of 0.8kg. Construct a 95% confidence interval for the mean weight of students in the University. 3. Compute for the sample size if the margin of error is 12, with a sample standard deviation of 35 and a 95% level of confidence.