A technician compares repair costs for two types of microwave ovens (I and II).
ID: 3371306 • Letter: A
Question
A technician compares repair costs for two types of microwave ovens (I and II). Let ? = 0.05. Sample information for these two machines is given in the table.
Microwave I
Microwave II
Sample Size
34
29
Sample mean (cost)
$86.44
$80.47
Known variance
$121.35
$114.67
If you conduct a test to determine whether the average repair cost of Microwave I is significantly more than the average cost of microwave II, the appropriate hypothesis is:
Ho: µB - µA < 0 vs. HA: µB - µA > 0
Ho: µA - µB = 0 vs. HA : µA - µB ? 0
Ho: µA - µB > 0 vs. HA: µA - µB < 0
Ho: µA - µB < 0 vs. HA: µA - µB > 0
Ho: µA - µB < 0 vs. HA: µA - µB > 0
Microwave I
Microwave II
Sample Size
34
29
Sample mean (cost)
$86.44
$80.47
Known variance
$121.35
$114.67
Explanation / Answer
here as we are checking if average cost of microwave is greater therefore it is right tailed test
correct hypothesis is :
Ho: µA - µB <=0
Ha: µA - µB > 0
( please revert if there are other part of this)
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