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Every check cashed or deposited at Lincoln Bank must be encoded with the amount of the check before it can begin the Federal Reserve clearing process. The accuracy of the check encoding process is of utmost importance. If there is any discrepancy between the amount a check is made out for and the encoded amount, the check is defective.Twenty samples, each consisting of 250 checks, were selected and examined. The number of defective checks found in each sample is shown below. The manager of the check encoding department knows from past experience that when the encoding process is in control, an average of 1.6% of the encoded checks are defective.
a. Determine the center line and the 3-sigma control limits for the p chart.
b. Plot the twenty recent sample findings on the chart and decide if the check encoding operation is in control.
Exposure to Criticism
The experience of being subject to disapproval or judgment from others, which can impact self-esteem and personal growth.
Independent Variable
The variable in an experiment that is manipulated or changed by the researcher to observe its effect on the dependent variable.
Confounding Variables
External factors that can affect the outcome of an experiment, introducing errors by influencing the dependent variable alongside or instead of the independent variable.
Random Assignment
A method used in experiments to ensure that every participant has an equal chance of being assigned to any given group, helping to control for confounding variables.
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