Test Reliability If a test that has reliability 0.7 has the number of questions increased...

Test Reliability If a test that has reliability 0.7 has the number of questions increased by a factor n, the reliability R of the new test is given by

a. What is the domain of the function defined by this equation?

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b. If the application used requires that the size of the test be increased, what values of n make sense in the application?