Statistics 101-106, Fall 1998

Pollard homework sheet 6

Due: Thursday 22 October?

(6.1)
According to the 1990 Census, 9.09% of the HNB judical district over-18 population was black. Why do you think that the Defense did not pursue the claim that the black population was underrepresented on juries? Would the evidence from the April questionnaire have supported such a claim? (The pattern from the April 1996 questionnaires was maintained for many more months.)

(6.2)
Carry out the test outlined in Section 5 of the notes for Lecture 6: On the basis of the observed counts of undeliverable summonses in the 1994-95 court year, would you accept the hypothesis that the undeliverable rates were the same for each half of the year? Should you use a one-sided or two-sided test? 

                Sep94	Oct94	Nov94	Dec94	Jan95	Feb95	Mar95	Apr95	May95	Jun95	Jul95	 Aug95
undeliverable	775	776	917	925	963	1171	1502	 951	1066	1130	991	1130
total       	6393	6525	7449	7007	7149	8110	10532	6273	7028	6802	6061	7280

Each Section leader will assign extra problems.