SUBJECT: ENGINEERING DATA ANALYSIS

TOPIC: Test of Hypothesis

NOTE:Make the solution detailed and clear in a sheet of paper.

SOLVE THE FOLLOWING PROBLEMS: 1. The average metal concentration recovered from a sample of metallic measurements in 36 sites is found to be 2.6 grams per millilitre. Find the .95 % condence intervals for the mean metallic concentration in the river. The population standard deviation is 0.4 2. A random sample of size n1 = 25 taken from a normal population with standard deviation of 5 has a mean of 80. A second random sample of size 36 with a standard deviation of 3 has a mean of 75. Find a 95% confidence interval for p; p2 . 3. in a research report, it is claimed that mice with an average life span of 32 months, will live to be about 40 months old when 40% of the calories in their food are replaced by vitamins and protein. is there any reason to believe that p