The average hourly wage of computer programmers with 2 years of experience has been $21.80. Because of high demand for computer programmers, it is believed there has been a significant increase in the average wage of computer programmers. To test whether or not there has been an increase, the correct hypotheses to be tested are
A、H0:m < 21.80 Ha:m ³ 21.80;
B、H0:m = 21.80 Ha:m ¹ 21.80;
C、H0:m > 21.80 Ha:m £ 21.80;
D、H0:m £ 21.80 Ha:m > 21.80
发布时间：2026-01-25 14:15:45
