I feel broken. My brother just left without saying goodbye, and chose to smoke over being with his family. I'm done being hurt so many times. ( have in mind my bio parents did the same thing) Plus to add on to that, the guy I liked asked out another girl after talking with him for so long... I usually don't complain, or whine, but when do I stop being the girl wearing the fake smile? ( because this is solve this using quadratic formula x^2+10x-17 )

Atechnician compares repair costs for two types of microwave ovens (type i and type ii). he believes that the repair cost for type i ovens is greater than the repair cost for type ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.