The state of California monitors the progress of elementary-aged students whose native language is not English using the California English Language Development Test. The test results for two school districts in Riverside County for the 2009-2010 school year follow. The proportion given is the proportion of 6th grade students judged as Advanced or Early-Advanced in English proficiency.

Does the data provide sufficient evidence to indicate that there is a difference in the proportion of students who are Advanced or Early-Advanced in English proficiency for these two school districts? Test using α = .01.

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District Number Tested Proportion Riverside Unified 602 54 Palm Springs 459 .31