Gina is finding the equation of the median-median line for the data set below.
what should she use for the summary points?

minutes studying(x) 0 5 10 10 15 20 25 30 30
test score(y) 68 61 54 64 73 76 80 79 85

group 1: (10, 61); group 2: (15, 64); group 3: (30,80)
group 1: (5, 61); group 2: (15, 73); group 3: (25, 79)
group 1: (10, 54); group 2: (20, 76); group 3: (30, 79)
group 1: (5, 61); group 2: (15, 73); group 3: (30, 8

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.