re-word this passage: By using the formula provided in the text (Total numbers needed=Desired sample size/Working phone rate Incidence rate Completion rate) we will be able to figure out the answer to question three. The lowest total number of telephone numbers needed for the entire survey is approximately 3,572. This was found by plugging the data into the equation: Total numbers needed= 250/0.7 x 0.5 x 0.8 = 250/0.28 = 893, we then take the 893 and multiply it by 4 which equals to 3572. assuming a high response rate. The highest total is around 11,112 which is also found by plugging data into the equation: Total numbers needed= 250/0.5 x 0.3 x 0.6 =250/0.09 =2778, then multiply that by 4 in order to get the 11112, based on lower response rates. These ranges ensure adequate sample sizes in each of Target's four regions for accurate data collection