A New Apparatus Has Been Devised to Replace the Needle

Essay

A new apparatus has been devised to replace the needle in administering vaccines. The
apparatus, which is connected to a large supply of vaccine, can be set to inject different
amounts of the serum, but the variance in the amount of serum injected to a given person
must not be greater than .08 to ensure proper inoculation. A random sample of 49
injections resulted in a variance of .118. Calculate the test statistic for the test of interest.