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Angela and Chelsea began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Angela took a test in Math and earned a 77.6, and Chelsea took a test in Art History and earned a 68.7. Use the fact that all the students' test grades in the Math class had a mean of 70.9 and a standard deviation of 11.9, and all the students' test grades in Art History had a mean of 63.3 and a standard deviation of 9 to answer the following questions.
a) Calculate the z-score for Angela's test grade.
z=
b) Calculate the z-score for Chelsea's test grade.
c) Which person did relatively better?
-Angela
-Chelsea
-They did equally well.
Using the six-step critical value approach, at the 0.05 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 25 minutes?
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a first is accustomed to training operators who do certain tasks on a production line. those operators who attend the
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What is the highest confidence level for which you can claim that more Delaware Republicans have read the Constitution than Delaware Democrats?
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