How many tissues should a package of tissuescontain? Researchers have determined that a person uses an average of 67 tissues during a cold. Suppose a random sample of 10,000 people yielded the following data on the number of tissues used during acold: x=53, s=18. Suppose the corresponding test statistic falls in the rejection region at =0.05. What is the correctconclusion?

A.

At =0.10, reject H0.

B.

At =0.05, accept Ha.

C.

At =0.05, reject H0.

D.

At =0.10, reject Ha.