A study of 203 police officers in eastern state found that their sample mean salary is 75,500 with a simple standard deviation of $3000 the same study of 245 police officers in a northern state found that their simple means salary of 74,500 but a simple standard deviation of $4000 suppose that the population of all police officers in an Easter state is $75,000 with a standard deviation of $2000 in the population mean of all police officers in a northern state of 74,000 with a standard deviation of $2000 what is the point estimate of u1