You want to buy a microwave oven and will choose Model A if its repair costs are lower than Model B's. You research the repair costs of 48 Model A ovens and 54 Model B ovens. The results of your research are shown in the figure to the right. At a = 0.01, would you buy Model A? Assume the samples are randomly selected and that the samples are independent. Complete parts (a)-(e).

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What is/are the rejection region(s)?
O A. z>2.575
O B. z< - 2.33
OC. z<3.32, z > 3.32
O E. z< -2.33, z> - 2.33
O G. z<2.575, z>2.575
O D. z< - 3.08, z> - 3.08
O F. z> - 3.08
O H. z<3.32
Transcribed Image Text:What is/are the rejection region(s)? O A. z>2.575 O B. z< - 2.33 OC. z<3.32, z > 3.32 O E. z< -2.33, z> - 2.33 O G. z<2.575, z>2.575 O D. z< - 3.08, z> - 3.08 O F. z> - 3.08 O H. z<3.32
You want to buy a microwave oven and will choose Model A if its repair
costs are lower than Model B's. You research the repair costs of 48 Model
A ovens and 54 Model B ovens. The results of your research are shown in
the figure to the right. At a= 0.01, would you buy Model A? Assume the
samples are randomly selected and that the samples are independent.
Complete parts (a)-(e).
Model A
Model B
X2 = S85
$2 = $15
x, = $88
S, = $12.50
Transcribed Image Text:You want to buy a microwave oven and will choose Model A if its repair costs are lower than Model B's. You research the repair costs of 48 Model A ovens and 54 Model B ovens. The results of your research are shown in the figure to the right. At a= 0.01, would you buy Model A? Assume the samples are randomly selected and that the samples are independent. Complete parts (a)-(e). Model A Model B X2 = S85 $2 = $15 x, = $88 S, = $12.50
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