(p. 376). The radon levels—measured in becquerels per cubic meter (Bq>m3 )—in the inner chambers of a sample of 12 tombs are listed in the table shown below. For the safety of the guards and visitors, the Egypt Tourism Authority (ETA) will temporarily close the tombs if the true mean level of radon exposure in the tombs rises to 6,000 Bq>m3 . Consequently, the ETA wants to conduct a test to determine if the true mean level of radon exposure in the tombs is less than 6,000 Bq>m3 , using a Type I error probability of .10. A StatCrunch analysis of the data is shown below the table. Specify all the elements of the test: H0, Ha, test statistic, p-value,

a, and your conclusion. 50 910 180 580 7800 4000 390 12100 3400 1300 11900 1100