Posted by **Sejul** on Monday, April 8, 2013 at 12:12am.

65 chemical engineering students are from urban/suburban backgrounds.

(Success is defined as a C or better in the course.)

52 of the 65 students succeeded.

Another 55 students were from rural backgrounds; 30 of these students succeeded.

A Is there good evidence that the proportion of students who succeed is different for urban/suburban vs. rural backgrounds?

B) Estimate the difference between the success rates for all urban/suburban and rural students who plan to study chemical engineering. Use 90% confidence.

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