A sample of 500 people are randomly chosen and 190 of them are left handed. a. Calculate the sample proportion p = b. Is the sample large enough to guarantee a normal distribution? ? since np(1 - p) = Select an answer c. Is the sample size small enough to ensure independence? ? since since 500 is Select an answer d. Find the Mean and standard deviation for the distribution of the sample proportion Mo = (round to 3 decimal places)