In: Statistics and Probability
In a study on air pollution carried out by an experimental station, we obtained the following amounts of soluble benzene, suspended in organic in micrograms per m3 , in different samples of air: 2.28, 1.9, 3.32, 2.68, 2.57, 2.57, 0.928, 1.22 Assuming that the sampled population is approximately normal, construct a confidence interval at the level 90% for the corresponding real average.
Answer---->>
Here Critical value calculate from t-distribution table.
Alpha= 1- confidence level = 1- 0.90 = 0.1 (level of significance)