Mathematics, 19.11.2019 01:31 mimigg0621
The article "uncertainty estimation in railway track life-cycle cost"† presented the following data on time to repair (min) a rail break in the high rail on a curved track of a certain railway line.159 120 480 149 270 547 340 43 228 202 240 218a normal probability plot of the data shows a reasonably linear pattern, so it is plausible that the population distribution of repair time is at least approximately normal. the sample mean and standard deviation are 249.7 and 145.1, respectively.(a) is there compelling evidence for concluding that true average repair time exceeds 200 min? carry out a test of hypotheses using a significance level of 0.05.state the appropriate hypotheses. h0: μ > 200ha: μ = 200h0: μ < 200ha: μ = 200 h0: μ = 200ha: μ ≠ 200h0: μ = 200ha: μ > 200h0: μ = 200ha: μ < 200calculate the test statistic and determine the p-value.
Answers: 2
Mathematics, 21.06.2019 17:40
Find the x-intercepts of the parabola withvertex (1,1) and y-intercept (0,-3).write your answer in this form: (x1,if necessary, round to the nearest hundredth.
Answers: 1
Mathematics, 22.06.2019 00:30
Parallelogram rstu is a rhombus. m∠r = 120° what is m∠t = 120 (what is m∠rsu? )
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Mathematics, 22.06.2019 00:30
Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?
Answers: 3
Mathematics, 22.06.2019 02:30
Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter? a. 3x^2 + 38x + 55 b. 4x + 16 c. 5x + 16 d. 3x^3 + 38x^2 + 55x
Answers: 1
The article "uncertainty estimation in railway track life-cycle cost"† presented the following data...
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