An education researcher claims that the overall average score of 15-year-old students on an international mathematics literacy test is 494.  You want to test this claim.  You randomly select the average scores of 33 countries.  The results are listed below.  At α = 0.05, do you have enough evidence to reject the researcher’s claim?  561     554     536     531     523     518     515     511     506     500     499      493     490     489     485     482     482     479     477     466     453    448  439     432     423     421     413     407     394     388     386     376     368