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Question $10$

Based on a careful work study in the Hofstetter Corp., the results shown in the following table have been observed:

Photocopying machine broken; included as delay in the allowance factor

${?}^{{?}^{?}}$ Power outage; included as delay in the allowance factor

The allowance factor for this type of work is given to be $12\%.($Round all intermediate calculations to two decimal places before proceeding with further calculations.$)$

a$)$ The normal time for the "prepare daily reports" operation $=$ minutes $($round your response to two decimal places$).$

The normal time for the "photocopy results" operation $=$

minutes $($round your response to two decimal places$).$

The normal time for the "label and package reports" operation $=$

minutes $($round your response to two decimal places$).$

The normal time for the "distribute reports" operation $=$

minutes $($round your response to two decimal places$).$

The normal time for the overall process $=$

minutes $($round your response to two decimal places$).$

b$)$ The standard time for this process $=$

minutes $($round your response to two decimal places$).$

c$)$ The number of observations that are required for a $99\%$ confidence level within $5\%$ accuracy $=$

$($round your response to the immediate higher whole number$).$