Installing a muffler at Barut Garage, Inc. involves a five work tasks. Azra has timed workers performing these tasks seven times, with

the results $($in minutes$)$ shown in the following table.

Given that Azra does not want an error of more than $0\mathrm{.}08$ and a confidence level less than $0\mathrm{.}80$ answer the following:

Provide the z$-$score: Blank $1$ Round to the nearest hundredth, for example $4\mathrm{.}22$

Does the number of observations for the following tasks warrant such confidence level?

Enter YES or NO$.$

Task # $3$ Install new muffler : Blank $2$

Task # $5$ Complete paperwork: Blank $3$

What are the required numbers of observations for these tasks? Enter the number.

Task # $3$ Install new muffler : Blank $4$

Task # $5$ Complete paperwork : Blank $5$

Assume that the number of observations for the following tasks justifies the confidence level and accuracy mentioned above. Also

note that Azra factors in a total of fatigue and personal allowance of $0\mathrm{.}15$ applied to job time. Provide the following results from

your solution: