Question 6(Multiple Choice Worth 40 points) (04.04 MC) Which of the following is the equation for the graph shown? graph of an ellipse on a coordinate plane going through approximately 0 comma 6, 0 comma negative 6, 4 and one half comma 0 and negative 4 and one half comma 0 with points inside ellipse at 0 comma negative 4 and 0 comma 4, and lines y equals 9 and y equals negative 9 x squared over 20 plus y squared over 36 equals 1 x squared over 36 plus y squared over 20 equals 1 x squared over 20 minus y squared over 36 equals 1 x squared over 36 minus y squared over 20 equals 1

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.