Exit Exam 1 Pt1 (76-100) Flashcards
In the absence of special causes, the process follows a distribution called
A. Normal
A sampling technique where the data collection is designed to select at fixed or count intervals
C. Systematic sampling
It is a graph of probability of accepting a batch against the proportion nonconforming
D. OC curve
It is the maximum proportion defective in the lot which can be considered satisfactory as a lot defect rate
A. Acceptable quality level
The following can be used to measure central tendency except
A. Range
B. Mean
C. Mode
D median
Range
Sampling bias is reduced with this type of sampling method
A. Convenicence sampling
B. Stratified sampling
C. Systematic sampling
D. Random sampling
D. Random sampling
Sampling results are greatly affected by how they are
A. Picked
B. Selected
C. Rcorded
D. Gathered
B selected
From the data gathered, you established that the current process having a high product cost has significant number of excursions. The inspection cost is relatively low. What acceptance sampling scheme will you implement?
A. Aql
B. Ltpd
C. Combined aql/ltpd
D. Aoql
B. Ltpd
This is the recommended approach for determining a sampling plan to protect both suppliers and customers.
A. Combined aql/ltpd
B. Aql
C. Ltpd
D. Aoql
A. Combined aql/ltpd
An inspector is to graph the total noncorfomities exsting in a sampled batch. What type of control chart is appropriate
B. Np chart
Military standard is aka ___
B. ISO 2859
When a process controlled by SPC is stopped due to out of control situatin, it may be restarted by a verbal instruction from the supervisor or engineer
True or false
False
The larger the Cpk value, the lesser the number of items that are out of specifications
True or false
False
These are facts and figures collected on some characteristics of the population or sample
D. Data
The probability of acceptance in operating characteristics curve is based on what statisticaltable
B. Z table
The goal of process control system iss to make decisions about actions affecting the ___
A. Process
B. Operation
C. Methods
D. Task
A. Process
In cluster sampling, the researcher does not need the names of all the population members, however fewer sampling points make it less likely that the sample is representative.
True or false
True
The following are characteristics of special causes except
A. Unusual to the process
B. Unpredicatble circumstances
C. Inherent in theprocess
D. Caused by people near the process
C. Inherent in the process
If an inspector wanted to know what types of nonconformities exist in a batch, the control chart that he will be using would be _
A. Np chart
The manager wantedto have an estimated how many pieces in the lot is nonconforming. What type of control chart will you present?
A. C chart
B. Np chart
C. U chart
D. P chart
C. U chart
In this type of sampling method, the population is divided into subpopulations
Stratified sampling
Randomization and stratification are two ways to ensure that the sample would be representative of the batch in order to capture all sources of variation in the population
True or false
True
What is the upper control limit given that the sample mean from a sample size of 3 is 28.45 inches with a mean range of 2.54
A. 33.2
B. 31.1
C. 32.45
D. 31.26
A. 33.2 (closest answer)
It is not necessary to stop a process with a red tag as long as the technician or enineer is able to fill out the analysis and action before the shiftt ends
T or f
False
Which of the following statements is not true?
A. For sampling plans with different sample sizes and fixed lot size/acceptance number, increasing the sample size will give the OC Curve a steeper slope and will decrease Pa for all quality levels.
B. For sampling plans with different acceptance numbers and fixed lot size/sample size, decreasing the acceptance number will give the OC curve steeper slope and will decrease Pa for all quality levels.
C. For sampling plans with different sample sizes/acceptance numbers and fixed lot size, OC curve starts to approach the ideal OC curve when the sample size and acceptance umber decrease.
D. For sampling plans with different lot sizes and fixed sample size/ acceptance number, having a moderately large batch size has a small effect on the probability of acceptance.
C. For sampling plans with different sample sizes/acceptance numbers and fixed lot size, OC curve starts to approach the ideal OC curve when the sample size and acceptance umber decrease.
