a)(i) Pop too large

Not all pop accessible

(ii) Testing involves destruction

b)(i) ${\raise0.5ex\hbox{$\scriptstyle {9850}$}
\kern-0.1em/\kern-0.15em
\lower0.25ex\hbox{$\scriptstyle {500}$}} = \left( {19.5} \right)$

${\raise0.5ex\hbox{$\scriptstyle {500}$}
\kern-0.1em/\kern-0.15em
\lower0.25ex\hbox{$\scriptstyle {499}$}}\left( {{\raise0.5ex\hbox{$\scriptstyle {194125}$}
\kern-0.1em/\kern-0.15em
\lower0.25ex\hbox{$\scriptstyle {500}$}} - {{\left( {{\raise0.5ex\hbox{$\scriptstyle {9850}$}
\kern-0.1em/\kern-0.15em
\lower0.25ex\hbox{$\scriptstyle {500}$}}} \right)}^2}} \right)$

$ = 0.160\left( {32} \right){\text{ }}\left( {3{\text{ }}sfs} \right)$ or $80/499$

(ii) $\frac{{19.73 - 19.7}}{{\sqrt {\frac{{''0.160''}}{{60}}} }}$

$ = 0.580$ or $0.581$

$1 - \Phi \left( {''0.580''} \right)$

$\left( { = 1 - 0.7191} \right)$

$ = 0.281$

(iii) “Yes” must be seen or implied to gain mks $X$ not nec’y normal

Sample large