For testing the difference between two population proportions, the pooled proportion estimate is found by taking:
    |    |  | a. the difference between the proportion of successes in each sample. |  |  | 
  |    |  | b. the proportion of successes from sample 1 plus the proportion of successes from sample 2. |  |  | 
  |    |  | c. the total number of successes in both samples divided by the total of both sample sizes. |  |  | 
  |    |  | d. None of these choices. |  |  | 
  
           For testing the difference between two population proportions, the pooled proportion estimate is found by taking:
    |    |  | a. the difference between the proportion of successes in each sample. |  |  | 
  |    |  | b. the proportion of successes from sample 1 plus the proportion of successes from sample 2. |  |  | 
  |    |  | c. the total number of successes in both samples divided by the total of both sample sizes. |  |  | 
  |    |  | d. None of these choices. |  |  | 
  
          For testing the difference between two population proportions, the pooled proportion estimate is found by taking:
    |    |  | a. the difference between the proportion of successes in each sample. |  |  | 
  |    |  | b. the proportion of successes from sample 1 plus the proportion of successes from sample 2. |  |  | 
  |    |  | c. the total number of successes in both samples divided by the total of both sample sizes. |  |  | 
  |    |  | d. None of these choices. |  |  | 
  
      For testing the difference between two population proportions, the pooled proportion estimate is found by taking:
    |    |  | a. the difference between the proportion of successes in each sample. |  |  | 
  |    |  | b. the proportion of successes from sample 1 plus the proportion of successes from sample 2. |  |  | 
  |    |  | c. the total number of successes in both samples divided by the total of both sample sizes. |  |  | 
  |    |  | d. None of these choices. |  |  | 
  
   For testing the difference between two population proportions, the pooled proportion estimate is found by taking:
        |       |  | a. the difference between the proportion of  successes in each sample. |  |  | 
    |       |  | b. the proportion of successes from sample 1  plus the proportion of successes from sample 2. |  |  | 
    |       |  | c. the total number of successes in both  samples divided by the total of both sample sizes. |  |  | 
    |       |  | d. None of these choices. |  |  | 
    
the answer for this will be option D as all the other options are incorrect hence the option is D