Questions from Engineering Statistics

Q: Consider the situation in Exercise 2.116, and suppose that

Consider the situation in Exercise 2.116, and suppose that the manufacturer can try only two combinations in a day. (a) What is the probability that any given set of two runs is chosen? (b) What is th...

Q: A certain form of cancer is known to be found in women

A certain form of cancer is known to be found in women over 60 with probability 0.07. A blood test exists for the detection of the disease, but the test is not infallible. In fact, it is known that 10...

Q: A producer of a certain type of electronic component ships to suppliers

A producer of a certain type of electronic component ships to suppliers in lots of twenty. Suppose that 60% of all such lots contain no defective components, 30% contain one defective component, and 1...

Q: A traffic control engineer reports that 75% of the vehicles passing

A traffic control engineer reports that 75% of the vehicles passing through a checkpoint are from within the state. What is the probability that fewer than 4 of the next 9 vehicles are from out of sta...

Q: A rare disease exists with which only 1 in 500 is affected

A rare disease exists with which only 1 in 500 is affected. A test for the disease exists, but of course it is not infallible. A correct positive result (patient actually has the disease) occurs 95% o...

Q: A construction company employs two sales engineers. Engineer 1 does the

A construction company employs two sales engineers. Engineer 1 does the work of estimating cost for 70% of jobs bid by the company. Engineer 2 does the work for 30% of jobs bid by the company. It is k...

Q: In the field of quality control, the science of statistics is

In the field of quality control, the science of statistics is often used to determine if a process is “out of control.” Suppose the process is, indeed, out of control and 20% of items produced are def...

Q: An industrial plant is conducting a study to determine how quickly injured

An industrial plant is conducting a study to determine how quickly injured workers are back on the job following injury. Records show that 10% of all injured workers are admitted to the hospital for t...

Q: A firm is accustomed to training operators who do certain tasks on

A firm is accustomed to training operators who do certain tasks on a production line. Those operators who attend the training course are known to be able to meet their production quotas 90% of the tim...

Q: A survey of those using a particular statistical software system indicated that

A survey of those using a particular statistical software system indicated that 10% were dissatisfied. Half of those dissatisfied purchased the system from vendor A. It is also known that 20% of those...