a) Is this an observational or experimental study. Justify answer.
b) Write down an Null and alternate hypothesis for analysing this data set.
Low Medium High Total
Colon cancer 398 397 430 1225
Rectal cancer 250 241 237 728
Controls 1368 1377 1409 4154
Give an example calculation of one of the 6 cells in the table of the expected frequency under the null hypothesis. Explain how the null hypothesis is the basis of this calculation.
d) determine the value of the relevent test statistic and the corresponding p-value.
e) what is the result of your analysis? write an appropriate conclusion
f) what assumptions about the data have you made? Are these assumptions justified in this case?
Need to know these answers asap to conpare with mine!!
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