PS1 206A F07 - ESM 206 Problem Set 1 MicroExam due Friday...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ESM 206 Problem Set 1 MicroExam due Friday, December 7 For the short version, I recommend trying at least A1, 5, 6, 7, 9; in section B, doing the power analysis for at least one of each type of t-test; doing all problems in sections C, E, and F; and in section D, assessing normality for problems 1 and 9. A: t -test practice For each of the following questions, (a) state the appropriate null and alternate hypotheses; (b) state which statistical procedure should be used to test the null hypothesis; (c) run the test, reporting the values of t , degrees of freedom, and P ; (d) draw conclusions based on α = 0.1, α = 0.05, α = 0.01, and α = 0.001. 1. A species of marine arthropod lives in seawater that contains calcium in a concentration of 30 mmole/kg of water. Thirteen of the animals are collected and the calcium concentrations in their coelomic fluid are found to be: 28, 27, 29, 29, 30, 30, 31, 30, 33, 27, 30, 32, and 31 mmole/kg. Test the appropriate hypothesis to conclude whether members of this species maintain a coelomic calcium concentration less than that of their environment. 2. Twenty-five intertidal crabs were placed in air at 24.3 ° C, and their body temperatures were measured as: 25.8, 24.6, 26.1, 22.9, 25.1, 27.3, 24.0, 24.5, 23.9, 26.2, 24.3, 24.6, 23.3, 25.5, 28.1, 24.8, 23.5, 26.3, 25.4, 25.5, 23.9, 27.0, 24.8, 22.9, 25.4. Test the appropriate hypothesis to conclude whether members of this species maintain their bodies at a different temperature than the air. 3. The menstrual cycles in a random sample of fifteen women, measured in days, were found to be: 26, 24, 29, 33, 25, 26, 23, 30, 31, 30, 28, 27, 29, 28. Test the appropriate hypothesis to determine whether the average human menstrual cycle equals a lunar month (29.5 days). 4. Over eight repeated experiments, the dissolving time (in seconds) of a drug in gastric juices was found to be: 42.7, 43.4, 44.6, 45.1, 45.6, 45.9, 46.8, 47.6. Test the null hypothesis that the mean dissolving time is no more than 45 seconds. 5. Using the data from the previous question, test the null hypothesis that the mean dissolving time is no less than 45 seconds.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern