Solve using given information

A survey is planned to compare salaries of plant managers in two regions. The plan is to take a sample of 200 plant managers from each region and ask their annual salaries. Assume that previous sample statistics suggest that o, = 02 = $3500 Are the sample sizes sufficient to produce a 95% confidence interval on , - 2 having a width of only $1000? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table, The sample sizes sufficient because the samples would need to be at least |people each, which is the planned sample sizes of 200. (Round up to the nearest whole number as needed.)