Question: What is the correct formula to determine the sample size for a multiple logistic regression model after obtaining the sample size n for the simple

What is the correct formula to determine the sample size for a multiple logistic regression model after obtaining the sample size n for the simple logistic regression model: Where R is the correlation between the predictor of interest and other predictors in the model

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=+b) Write the null and alternative hypotheses.

=+c) Should the professor spend the money for this software? Support your recommendation with an appropriate test.

=+) Explain what your P-value means in this context.