Alyssa and Alan medical group found that the mean annual earning of the pharmacist in the US are $230,000 and those of pediatricians to be $225,000 suppose that these results are based on random...

Alyssa and Alan medical group found that the mean annual earning of the pharmacist in the US are $230,000 and those of pediatricians to be $225,000 suppose that these results are based on random samples of 300 pharmacists and 400 pediatricians and that the population standard deviations are 28,000 and 32,000 respectively.

A.What is the standard error?

B.test the plane using 1% level of significance at the mean annual earning of pharmacists is greater than that of the pediatricians.

Cconstruct a 98% confidence interval for the difference between the mean annual earnings of pharmacist and pediatricians.