Consider the following data. The breadth on day $3$ is

$\backslash$table$[[$Day$,1,2,3,4],[$Advances$,870,760,960,840],[$Declines$,880,990,790,910],[$Volume advancing$($m$),580,620,480,510],[$Volume declining$($m$),670,580,720,520],[$Yield on top$-$rated corporate bonds,$6\mathrm{.}8\%,6\mathrm{.}7\%,6\mathrm{.}7\%,6\mathrm{.}6\%$