The following data were obtained from a preliminary activity sampling exercise.

When doing the following calculations, you need to discuss the implications of each calculation.

Setting up

IIIII IIII III

Machine running

IIIII III

Idle

II

Operator inspecting

IIIII IIII

$2\mathrm{.}1$

You need to calculate the additional number of observations needed to state with a $95\%$ confidence level that the results will be a true reflection on the amount of idle time at this specific work space. Discuss your results.

$2\mathrm{.}2$

If the machine running time is more important for the company than idle time what will be the total number of observations needed? Discuss your results.

Eusily to Identifinin

$2\mathrm{.}3$

Is this difference important and why or why not? $-$ y good machines.

$2\mathrm{.}4$

What is the limit of error of this study $($idle time$)$ for a$=0\mathrm{.}05?$