lljln an effort to rnonitor the level of lead in the air after an explosion at a battery factor}; the following lead readings were taken for 6 days following the explosion {in 315-1113). \"My m mm a. What is the point estimate for the population mean lead level in the air over the 6 days following the explosion? h. Calculate the standard error c. Find the rnargin of error that corresponds to a 95% condence interval