. . . x The sample proportion Is defined by P = 2L1 ' 3. Use the methods in section 5.3 to find the mean of the sample proportion. 4. The standard deviation of the sample proportion is called it's \"standard error\". Use the methods in section 5.3 to find the standard error of the sample proportion. 5. Note that the sample proportion can be written as E. What is the distribution of if? Use the distribution of Y to check your answers to questions 3 8t 4