please help me

You have been given a task which may take 60 days to complete; however if the conditions

are favorable it may be completed in 55 days. In the worst case scenario, it may take 70

days. Find the PERT estimate, standard deviation and variance for this task.

Eample: for any activity vou estimate that it can be complesed within 10 days, it the weather condinions are bad, this activiny can take about 11 don. However, it all conditions are fovorable, this activity can be completed in 7 days. Using PERT, calculate the three point estimate, standard deviation, and variance for this activity. Solution: We know the PfRT essimate formula: ter ito +4tm+tp)/6 Hete: te x peAT Estimates to be cakulated te = Optimiatic Time =7 dars im = Moat sikely Time * 10 dow tp = Pessimistic Time =11 dars Substututing these values in the PERT formula: tes [1e+4tm+tg]j =(7+410+11)/6 (7+40+11)/5 - 5.16 =9.6dar. Nence the PERT estimate for this activity is 9.6 dars. Standard Deviation =tptol/6 =(117)) =4/6 +0.57 Now, Variance + (Standasd Deviation )2 =0.570.67 =0.45 Practice Question:2 Pou have been given a task which may cake 60 dass to complele; however af the conditions ate favorable a inay be completed in 55 days In the wont che kerario, it may take 70 dayn. Find the PERT estimate, standard devacion and variance foe this task|