Mathematics, 07.11.2019 22:31 dedgefield
The article uncertainty estimation in railway track life- cycle cost (j. of rail and rapid transit, 2009) 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 43 228 202 240 218 the sample mean and standard deviation are 249.7 and 145.1, respectively. 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 α = 0.05.
Answers: 1
Mathematics, 21.06.2019 18:00, kezin
The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?
Answers: 1
The article uncertainty estimation in railway track life- cycle cost (j. of rail and rapid transit,...
Mathematics, 10.04.2020 19:20
English, 10.04.2020 19:20
Mathematics, 10.04.2020 19:20
Mathematics, 10.04.2020 19:20
Mathematics, 10.04.2020 19:21
Mathematics, 10.04.2020 19:21
World Languages, 10.04.2020 19:21