Fred did 243 sit-ups in 9 minutes.
Julio did 128 sit-ups in 4 minutes.
Holly did 144 sit-ups in 9 minutes.
Olivia did 60 sit-ups in 5 minutes.

Who did the most sit-ups per minute?

Which data set has a greater spread? why? set a: {38, 12, 23, 48, 55, 16, 18} set b: {44, 13, 24, 12, 56} has a greater spread because .

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

(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.)