DO$05$ Given na fayv $(05)$ sampul d$$n tek. Di sampul min $($X$-$bar$)$ na: $15\mathrm{.}36,14\mathrm{.}61,16\mathrm{.}36,20\mathrm{.}28,$n $15\mathrm{.}77$ risp$$ktv$$li$.$ D$$n bak, di k$$r$$sp$$nd$$ns r$$nj d$$n na; $10\mathrm{.}79\mathrm{.}8\mathrm{.}37,4\mathrm{.}81,8\mathrm{.}17,$n $3\mathrm{.}31$ risp$$ktv$$li$.$ If di $$pa k$$ntrollimit f$$ X$-$bar ch$$t na $21\mathrm{.}65,$ wetin f$$ bi di sampul saiz we fit pas $$l$?$ O a $2$ Ob$,$ N$$n n$$ k$$r$$kt OC$.4$ O d$.5$ O e$.3.3.$