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pushkarsaini18 / simple linear regression.ipynb
Created Jul 31, 2021
simple linear regression.ipynb (delivery time )
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View hypothesis assignment.ipynb
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1. The time required for servicing transmissions is normally distributed with = 45 minutes and = 8minutes. The service manager plans to have work begin on the transmission of a customer’s car 10 minutes after the car is dropped off and the customer is told that the car will be ready within 1 hour from drop-off. What is the probability that the service manager cannot meet his commitment?
Ans- We have a normal distribution with = 45 and = 8.0. Let X be the amount of time it takes to complete the repair on a customer's car. To finish in one hour you must have X ≤ 50 so the question is to find Pr(X > 50).
Pr(X > 50) = 1 - Pr(X ≤ 50).
Z = (X - )/ = (X - 45)/8.0
Thus the question can be answered by using the normal table to find
Pr(X ≤ 50) = Pr(Z ≤ (50 - 45)/8.0) = Pr(Z ≤ 0.625)=73.4%
Probability that the service manager will not meet his demand will be = 100-73.4 = 26.6% or 0.2676
2. The current age (in years) of 400 clerical employees at an insurance claims processing center is normally distribute
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