An operator needs to produce 4 pins and 6 shafts using a, Ask an Expert

Statistics

An operator needs to produce 4 pins and 6 shafts using a lathe which has 72% chance of producing a defect-free pin at each trial and 65% chance of producing a defect-free shaft at each trial. The operator will ?rst produce pins one by one until he has 4 defect-free pins and then produce shafts one by one until he has 6 defect-free shafts.

a. What is the expected value and variance of the total number of trials that the operator will make?

b. Suppose each trial for pins takes 12 minutes and each trial for shafts takes 25 minutes. What is the expected value and variance of the total time required?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91676521

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

In order to fund her retirement helen needs her portfolio

In order to fund her retirement, Helen needs her portfolio to have an expected return of 13.8 percent per year over the next 30 years. She has decided to invest in Stocks 1, 2, and 3, with 25 percent in Stock 1, 50 perce ...

You are given the sample mean and the population standard

You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. A random sample of 44 gas grills has a mean price of $6 ...

A researcher is interested in learning more about the

A researcher is interested in learning more about the protective effects of exercise. He conducts a study where he collects information about stress levels (measured on a multi-item Likert scale) and hours of exercise co ...

What types processes or procedures support project

What types processes or procedures support project management, continuous improvement and innovative initiatives?

Problem arrival of vehicles at new jersey turnpike toll

Problem: Arrival of vehicles at New Jersey Turnpike toll booth on Saturdays at dawn is modeled as a Poisson Arrival process with a rate of 1.21 vehicles per minute. Let X be a random variable that records the number of a ...

The diameters of tennis balls are distributed normally the

The diameters of tennis balls are distributed normally. The mean is 2.7 inches and the standard deviation is 0.3 inches. Find the probability that the diameter of a selected bearing is greater than 3 inches. (Round your ...

An investment costs 60096 and offers a return of 10 percent

An investment costs $60,096 and offers a return of 10 percent annually for ten years. What are the annual cash inflows anticipated from this investment? Use Appendix D to answer the question. Round your answer to the nea ...

Te number of accidents in a day in town a is given by x

The number of accidents in a day in town A is given by X , and the number of accidents in a day in town B is given by Y . The joint probability function for X and Y Y is f ( x , y )=964 x ! y ! for x =0,1,2,3 an ...

In a certain city a school administrator hypothesized that

In a certain city, a school administrator hypothesized that students enroll in school within 5 km from their homes. To check this claim you asked 30 student from the said city and you found that the mean distance between ...

Suppose a machine has two components that prevent injury

Suppose a machine has two components that prevent injury; component A and component B. If either of the components fail, an employee will be injured. It is important to note that both A and B cannot fail at the same tim ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert