A person drops a rock off a bridge. The elevation-versus-time of the rock's motion is shown in the table. Time (sec.)
Elevation (ft.)
0
150
1
1
134
N
86
3
6
3.1
0
For how many seconds is the rock falling?
seconds
Y

(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.)