Work shifts. The following table shows the number of staff members from four different departments in a
Question:
Work shifts. The following table shows the number of staff members from four different departments in a hospital assigned to two different shifts (morning and night)
during work hours.
Shifts Morning Night Total Departments Accident and emergency (A&E) 38 12 50 Maternity ward 25 11 36 General ward 17 5 22 Recovery room 20 11 31 Registration & pharmacy 8 3 11 Total 108 42 150
a) What percent of staff members are working during the night shift?
b) What percent of staff members working the morning shift are from the Registration & Pharmacy department?
c) What percent of the night-shift staff members are from the Registration & Pharmacy department?
d) What is the marginal distribution of origin?
e) Obtain the column percentages and show the conditional distributions of origin by the shifts.
f) Do you think that the shift is independent of the department? Explain.
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