You need to know if the population of workers living more than 10 km from a factory is statistically different from those living less than 10 km away. With the information in the following table, calculate the Chi-square statistic and determine if the frequencies are different according to this test and a significance level of 0.05.

Option Expected Frequencies Observed Frequencies Less than 10 km 3256 3500 More than 10 km 2460 3000