Three years ago, Chicago spent nearly $2 million — and $1.7 million more in legal fees — to compensate dozens of women denied firefighter jobs because of a discriminatory test of upper body strength that City Hall has now scrapped. Now, a dozen women who wanted desperately to become paramedics are accusing the Chicago Fire Department of devising two new physical agility tests that are equally biased against women. One test requires candidates to go up six flights of stairs with a 250-pound dummy within eight minutes. The other requires candidates to step onto and off of an 18-inch-high box to the beat of a metronome for two minutes without missing a beat while holding 25-pound weights in each hand.