Commercial dredging operations in ancient rivers occasionally uncover archaeological artifacts of great importance. One such artifact is Bronze Age spearheads recovered from ancient rivers in Ireland. A recent study gave the following information regarding discoveries of ancient bronze spearheads in Irish rivers.

Commercial dredging operations in ancient rivers occasionally uncover archaeological artifacts of great importance. One such artifact is Bronze Age spearheads recovered from ancient rivers in Ireland. A recent study gave the following information regarding discoveries of ancient bronze spearheads in Irish rivers River Bann Blackwater Erne Shannon Barrow No. of spearheads 20 10 15 28 14 (a) Make a Pareto chart for these data. 40 40 40 30 28 30 28 30 28 30 28 No. of Spearheads 20- 20 20 No. of Spearheads 20- No. of Spearheads 20- 20 No. of Spearheads 20- 20 15 14 15 14 10 10 10 O 0 Bann Barrow Blackwater Erne Shannon AO 0 Shannon Bann Eme Barrow Blackwater AO 0 Shannon Eme Blackwater Barrow Bann AO Blackwater Barrow Eme Bann Shannon (b) Make a circle graph for these data. Shannon, 40.4% Shannon, 32.2% Shannon, 36.7% Shannon, 36.8% Bann, 23.0% Bann, 25.5% Bann, 25.3% Bann, 22.3% Blkwtr, 6.4% Blkwtr, 11.5% Blkwtr, 8.2% Blkwtr, 4.6% Barr, 14.9% Eme, 17.2% Barr, 14.3% Barr, 16.1% Eme, 16.0% Barr, 16.1% Erne, 15.3% Eme, 17.2% O