These girls are selling cases of popcorn to earn money for a bandtrip. in week 1emily sold 2 3/4 cases, brenda sold 4 1/4 cases and shannon 3 1/2cases how many cases did they sell in all?

(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.)