Spring 2011 Stat 205 Homepage

Stat 205
Spring 2011

Elementary Statistics for the Biological and Life Sciences

Instructor: Tim hanson Office: LeConte 219C
Instructional Assistant: JeanMarie Thompson

Class Meetings:
Tuesday/Thursday 3:30 - 4:45 in Sloan College 112


Dr. Hanson's office Hours: Monday/Wednesday 1:30-2:30, & Tuesday 1-2.
JeanMarie's tutoring center hours: Monday 9-11, Tuesday/Thursday 11-12, & Wednesday 11-1 in LeConte 215A.

Textbook: Samuels, M.L., and Whitmer, J.A. (2003). Statistics for the Life Sciences, 3rd Ed.

Course Materials

Course Syllabus
Web-based instructional tools.
Last semester's exams, quizzes, etc.

Lecture Notes

  • Chapters 2, 3, and 4: PowerPoint, and PDF. If you print these, I'd recommend printing several (e.g. 6) to a page.
  • Chapters 5, 6, and 7: PowerPoint, and PDF.
  • Chapters 9, 10, and 12: PowerPoint, and PDF.

    • Topics Covered:

    DateTopics Homework
    Tues., Jan. 11 UNIVERSITY CLOSED DUE TO WEATHER --
    Thur., Jan. 13 Introduction, expectations, grading. Types of variables. Section 2.1. 2.1, 2.2.
    Tues., Jan. 18 Frequency distributions, skewness, describing graphical displays. Sections 2.2, 2.3. 2.4, 2.7, 2.8, 2.10 (also describe the shape of the histograms in terms of skew and modality).
    Thur., Jan. 20 QUIZ 1. Descriptive statistics: mean, median, quartiles, 5 number summary, IQR, boxplots, outliers. Sections 2.4, 2.5, 2.6. 2.18, 2.19, 2.31, 2.32 (for 2.31 and 2.32 construct boxplots as in class, but also determine if there are any outliers by computing the upper and lower fence), 2.46(a,b,d), 2.47, 2.48.
    Tues., Jan. 25 Parameter vs. statistic, random sampling, proportions, probability. Sections 2.8, 2.9, 3.2, 3.3, 3.5.3.12, 3.13, 3.14.
    Thur., Jan. 27 QUIZ 2. Independence, conditional probability, law of total probability (formal approach to Section 3.4), Bayes' rule. Section 3.5 continued.3.7, 3.8, 3.11.
    Tuesday, Feb. 1 Continuous random variables, densities, discrete random variables, mean and variance of a discrete random variable; Sections 3.6, 3.7. 3.16, 3.17, 3.46, 3.18, 3.20, 3.21, 3.22, 3.23.
    Thursday, Feb. 3 QUIZ 3. Binomial random variable; Section 3.8. 3.27, 3.28, 3.29, 3.30, 3.32, 3.33.
    Tuesday, Feb. 8 Normal random variable; Sections 4.2, 4.2, 4.3. 4.3, 4.4 (use 4.3), 4.9, 4.10 (use 4.9), 4.13.
    Thursday, Feb. 10 QUIZ 4. Normal random variables, continued. 4.11, 4.14, 4.15. From problem 4.11, what is the probability of being between the 20th and 80th percentile?
    Tuesday, Feb 15 Review Chapters 2, 3, 4. Review notes. --
    Thursday, Feb. 17 EXAM I (open book); bring your calculator. --
    Tuesday, Feb. 22 Sampling distributions of proportions (dichotomous) and means (normal populations). Book sections: 5.1, 5.2, 5.3. 5.1, 5.2, 5.3, 5.4, 5.15, 5.18.
    Thursday, Feb. 24 The central limit theorem, unbiasedness, standard error of the mean. Book sections: 5.3, 5.4, 6.1, 6.2. 5.16, 5.24, 5.28, 6.1, 6.2, 6.3.
    Tuesday, March 1 The t distribution and it's relationship to Guinness Stout. Confidence interval for the mean. Book section: 6.3. 6.10, 6.11, 6.13, 6.14, 6.19, 6.22.
    Tuesday, March 3 QUIZ 5. Agresti-Coull (AC) CI for population proportion. Sample size determination. Book section: 6.6. 6.41, 6.42, 6.43, 6.44, 6.48.
    Tuesday, March 15 Confidence interval for the difference of two means. Book sections: 7.1, 7.2, 7.3 7.1, 7.8, 7.10, 7.11, 7.14.
    Thursday, March 17 QUIZ 6. The t-test. Book section 7.4. 7.23, 7.25, 7.27, 7.29, 7.30.
    Tuesday, March 22 More on the t-test: non-zero null values, error rates, relationship between CIs and hypothesis tests, power. Book section 7.5. 7.42, 7.43, 7.44, 7.45.
    Thursday, March 24 One-sided alternatives for the t-test; Wilcoxon Mann Whitney rank sum test. Book sections 7.6, 7.11. 7.46, 7.47, 7.48, 7.49, 7.50(a), 7.52, 7.53, 7.77, 7.78, 7.79, 7.80, 7.82 (compare with histograms of each sample). Sample R code.
    Tuesday, March 29 Review for Exam II. Problems assigned above. Review notes.
    Thursday, March 31 Exam II. Open book, bring a calculator. --
    Tuesday, April. 5QUIZ 7 handed out. Linear regression: Least-squares, SS(resid). Book Sections 12.1 and 12.2. 12.3, 12.7, 12.9. Sample R code for 12.9.
    Thursday, April 7QUIZ 7 picked up. Linear regression: Prediction and testing H0: β1=0. Book sections 12.3 and 12.4. 12.16, 12.17, 12.19, 12.23(a).
    Tuesday, April 122 by 2 tables and beyond: Differences in proportions, relative risk, and odds ratios; independence; case-control studies and odds ratios. Book sections 10.7, 10.9. Lecture notes.10.57, 10.58, 10.59 (for all problems also compute relative risk, odds ratio, and 95% CI for the OR; formally test H0: OR=1), 10.68, 10.69, 10.70.
    Thursday, April 14QUIZ 8. Logistic regression. Book Section 12.7 (pp. 582-585). Lecture notes.Homework problem in notes.
    Tuesday, April 19QUIZ 9 handout out. Sensitivity, specificity, prevalence, and predictive values; ROC curves. Lecture notes.Homework problems in notes.
    Thursday, April 21QUIZ 9 handed in. Review for final exam. Lecture notes.--


    Homework solutions

  • Chapter 2.
  • Chapter 3.
  • Chapter 4.
  • Chapter 5.
  • Chapter 6.
  • Chapter 7.
  • Chapter 12.
  • Chapter 10.

    • Selected Quiz and Exam keys

  • Quiz 1.
  • Quiz 2.
  • Quiz 3.
  • Quiz 4.
  • Exam I.
  • Quiz 5.
  • Quiz 6.
  • Exam II.
  • Quiz 7.
  • Quiz 8.
  • Quiz 9.