Over several weeks of normal, or in-control, operation 20 samples of 150 packages each of synthetic-gut tennis strings were tested for breaking strength. A total of 125 packages of the 3000 tested failed to conform to the manufacturer's specifications. a. What is the estimate of the process proportion defective when the system is in control? b. Compute the upper control and the lower control limits for a p-chart. c. With the results of part (b), what conclusion should be made about the process if tests on a new sample of 150 packages find 12 defective? Do there appear to be assignable causes in this situation? d. Compute the upper and lower control limits for an np chart? e. Answer part "c" using the results of part (d). f. Which control chart would be preferred in this situation? Why ?
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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