Most medical school graduates in the US enter their residency programs at teaching hospitals in July. A recent study suggests that a spike in deaths due to medication errors coincides with this influx of new practitioners. The study indicates that the number of deaths is significantly higher than expected in July.
(a) What type of statistical analysis was probably done to arrive at this conclusion?
(b) Is the χ² statistic likely to be relatively large or relatively small?
(c) Is the p-value likely to be relatively large or relatively small?
(d) What does the relevant categorical variable record?
(e) What cell contributes the most to the χ² statistic?
(f) In the cell referred to in part (e), which is higher: the observed count or the expected count?