Homework6 BIOST310 Sp2018.docx - Biostat 310 Spring 2018...

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Biostat 310 Spring 2018 Homework 6 Total Points: 15 points There is a total of 10 graded points (questions indicated by “*”) and then an additional 5 points in total for the additional questions without an asterisk, graded according to: 0= no additional problems attempted; 3 = some additional problems incomplete or showing little effort; 5 = all additional problems show reasonable effort. For multiple choice and true or false questions, you only need to indicate your answer. 1. *(1 point) The Pearson Chi-square test is used to test hypotheses about what? A. Differences in proportions between two groups B. Differences in proportions between more than two groups C. Association between two categorical variables D. All of the above 2. To use the one sample t test you must always assume the data in the population has a A. Binomial distribution B. Normal distribution C. Student’s t distribution D. Not always necessary to assume a particular distribution 3. The paired t test, used to test the difference between two means, is A. a one-sample test evaluating the mean of differences B. always valid even for small samples C. only valid when the variances of the two different groups of observations are equal 4. *(1/2 point) An objective of a health initiative was to decrease the amount of sweetened beverages consumed per week to an average of less than 7 servings per week. A survey of 500 adults in Washington state was taken 6 months after implementation of the intiative, and found that the average number of sweetened beverages was 5.5 servings per week.
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  • Winter '17
  • Lyndia Brumback
  • Null hypothesis, Statistical hypothesis testing, Clopidogrel, adverse event rate, study entry

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