Friday, October 21, 2016

Numbers 1.7




Null: There will be significant difference between the pass/fail rates of students.
It appears that taking algebra before statistics cuts down on fail rates considerably. The test concludes that it is "extremely statistically significant."  We can conclude that students are more likely to pass statistics if they take algebra beforehand. We fail to reject the null hypothesis.

Sample problem:
Withdraws in the first semester are problematic in college. Taking 500 freshmen, 50 of whom withdraw in their first semester. Graduation rates for those who did not withdraw is 70% and graduation rates for those who did withdraw is 40%. What is the statistical significance between the two populations?


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