Two students did a problem as above, but one used x for the first variable and y for the secon variable and the other student used x for the second variable and y for the first variable. how did thier answers differ and which one, if either, was incorrect?

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(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)

What else equals 42 and 30 for multiply