Question

3. Astronauts often report episodes of disorientation as they move around the zero-gravity spacecraft. To com pensate, crew members rely heavily on visual information to establish top-down orientation. An empirical study was conducted to assess the potential of using color brightness as a body orientation cue. Ninety Col lege of Engineering students at a specific university were randomly selected. They reclined on their backs in the dark and were disoriented when positioned on a rotating platform under a slowly rotating disk that filled their entire field of vision. Half the disk was painted with a brighter level of color than the other half The students were asked to say "stop" when they believed they were right-side-up. The brightness level of the disc was recorded. Of the ninety students, fifty-eight selected the brighter color level. (a) [2 pts] Describe the parameter of interest in this study. Include proper notation. (b) 6 pts] Calculate the parametric 90% confidence interval, checking any relevant conditions. Stat 332 Exam 2 March 25 Page 4 of 8 (c) [2 pts Interpret the interval from the previous part in the context of the problem. (d) [3 pts] Explain what is meant by "90% confidence." (e) 3 pts] Can we infer that a majority of all college students would select brighter color levels as a body orientation cue? Explain why or why not

Answer 1

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