A business with 5 copy machines keeps track of how many copy machines need service on a given day.It believes this is binomially distributed with a probability of p = 0.2 of each machine needing service on any given day.It has collected the following based on a random sample of 100 days.
Given this information,assuming that all expected values are sufficiently large to use the classes as shown above,the critical value based on a 0.05 level of significance is 9.4877.
Definitions:
Hawthorne Effect
The phenomenon where subjects alter their behavior simply because they are aware that they are being observed.
Random Errors
Errors in measurement that lead to inconsistent results, often caused by unpredictable and uncontrollable factors.
Randomized Controlled Trials
A study design that randomly assigns participants into an experimental group or a control group to measure the effect of an intervention.
Face Validity
The degree to which an assessment or test appears to measure what it is intended to measure, based on subjective judgment.
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