2 2.5 points Justin and Hayley conducted a mission to a new planet, Planet X, to study arm length. They took a random sample of 100 Planet X residents and calculated a 95% confidence interval for the mean arm length. What does a 95% confidence interval for arm length tell us in this case? Select the best answer I am 95% confident that most Planet X residents will have arm lengths within this interval I am confident that most (95%) of all Planet X residents will have an arm length within this interval. I am 95% confident that this interval includes the sample mean (x) arm length. I am 95% confident that this interyal includes the population mean arm length Previous Next