In an effort to monitor the level of lead in the air after an explosion at a battery factory, the following lead readings were taken for 6 days after the explosion. Mon Tue Wed Thu Fri Sat
5.40 1.10 0.82 0.73 0.48 1.10
a. Find the 95% confidence interval for the population
b. What is the point estimate for the population level
mean lead level in the air over the 6 days following the
of lead?
explosion?
c. What is the margin of error for this confidence
d. Would a 90% confidence interval have a larger or
interval?
smaller margin of error? LARGER / SMALLER
e. Explain.