North Carolina State University looked at the factors that affect the success of students in a required chemical engineering course. Students must get a C or better in the course in order to continue as chemical engineering majors. There were 60 students from urban or suburban backgrounds, and 51 of these students succeeded. Another 55 students were from rural or small-town backgrounds; 30 of these students succeeded in the course. A) Is there good evidence that the proportion of students who succeed is different for urban/suburban versus rural/small-town backgrounds? (use a=.05) z =___________________ P-value =______________ Conclusion: a or b a) There is significant evidence that the proportions of urban/suburban and rural/small-town students who succeed differ. b) There is no evidence that the proportions of urban/suburban and rural/small-town students who succeed differ. B) Give a 80% confidence interval for the size of the difference. Lower bound:____________________ Upper bound:______________________
North Carolina State University looked at the factors that affect the success of students in a required chemical engineering course. Students must get a C or better in the course in order to continue as chemical engineering majors. There were 60 students from urban or suburban backgrounds, and 51 of these students succeeded. Another 55 students were from rural or small-town backgrounds; 30 of these students succeeded in the course.
A) Is there good evidence that the proportion of students who succeed is different for urban/suburban versus rural/small-town backgrounds? (use a=.05)
z =___________________
P-value =______________
Conclusion: a or b
a) There is significant evidence that the proportions of urban/suburban and rural/small-town students who succeed differ.
b) There is no evidence that the proportions of urban/suburban and rural/small-town students who succeed differ.
B) Give a 80% confidence interval for the size of the difference.
Lower bound:____________________
Upper bound:______________________
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