{3} We wish to estimate the mean VO2 uptake for population of joggers from a sample of 25. The sample yields a mean Y of 47.5 ml/Kg and Standard deviation S of 4.8. Construct the 95 % CI for population mean and interpret your results

{4} A survey of 935 adults indicated that 45 % of the adults think that airplanes are the safest mode of transportation, construct a 99 % CI for the proportion of adults who think that airplanes are the safest mode of transportation.