Q.1

"Lampshells" are special shellfish animals with fossil records going back 600 million years. Little information is available about present-day populations of lampshells. While generally rare, they are abundant around parts of New Zealand, especially a particular species called "mermaid toenails". They are seen in shallow water or washed up on beaches. Using scuba diving equipment, the researchers selected a random quadrat (2m x 2m) from a surveyed beach and scooped up all the sediment in that quadrat to a depth of 30cm. On shore, the live and dead shells were sorted. They measured the length of every "mermaid toenail" in each group: live and dead. The data is presented in the file "Mermaid shells.xlsx".

AutoSave OFF A A F Y C ... Mermaid Shells Home Insert Draw Page Layout Formulas Data Review View Tell me Share Comments Calibri (Body) 11 AA D Wrap Text v General Paste BIUv A E Merge & Centre v v % " Conditional Format Cell Insert Delete Format Sort & Find & Analyse Formatting as Table Styles Filter Select Data D7 X V fx C D E F G H K M N P Q R S U V W Lengths of "Mermaid's toenails"/ mm Live Dead 22.34 24.93 18.72 16.56 17.64 16.82 16.84 21.35 20.04 23.34 22.06 19.91 25.18 23.38 10.28 18.45 13.08 24.75 1.48 16.22 6.18 12.37 13.06 18.27 16.92 10.83 19.96 19.86 8.08 22.62 5.76 24.56 15.9 21.38 12.98 24.32 4.18 22.71 .9.02 20.06 15.54 17.7 20.68 20.12 6.38 22.52 13.08 25.93 21.26 19.12 21.86 19.95 21.06 20.22 9.06 13.75 23.82 20.49 15.64 21.55 43 Sheet1 Sheet2 Sheet3 + Ready x Accessibility: Investigate 100%