D Question 3
1 pts
The following problem can be solved using the box/window pane method. Fill in the grid with the
correct numbers. Type negative numbers using the - symbol and no space between the - and the
number (-4 not-4).
(3x2 + x + 3)(4x2 - 4x + 1)
3x2
Х
3
442
1x4
x2
-4x
x2
2
1
х

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.