Fall09Midterm1B - Midterm 1 - Form B - Fall 2009 Economics...

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Unformatted text preview: Midterm 1 - Form B - Fall 2009 Economics 203 Instructor: Petry Name: Before beginning the exam, please verify that you have 18 pages with 38 questions in your exam booklet. You should also have a decision-tree and formula sheet provided to you. Please include your full name and Net-ID on your bubble sheets. Based on the name of your TA and discussion time, please code in the following for the Section portion on your scantron: TA Name Discussion Day and Time Section Mahdi Rastad Friday 8am 00001 Mahdi Rastad Friday 9am 00002 Soroush Ghazi Kalahroudi Friday 10am 00003 Soroush Ghazi Kalahroudi Friday 11am 00004 Luke Godwin-Jones Friday 12pm 00005 Luke Godwin-Jones Friday 1pm 00006 Josh Brown Friday 2pm 00007 Josh Brown Friday 3pm 00008 Lusha Zhu Friday 4pm 00009 Lusha Zhu Friday 5pm 00010 Good luck! 1. In ANOVA, the total amount of variation within samples is measured by: a. the grand mean b. the mean squares for treatments c. the mean squares for error d. the sum of squares for error e. the sum of squares for treatments 2. Without the highest paid basketball stars in the NBA, the distribution of NBA player salaries is very normally distributed. However, adding in the highest paid basketball stars skews the distribution. How would the distribution of salaries best be described with all basketball players? a. Positively skewed with mean < median b. Negatively skewed with median < mean c. Positively skewed with median < mean d. Negatively skewed with mean < median e. Perfectly bell shaped with mean = median 1 3. Which of the following best describes statistical inference? a. It is the way we tell which test to perform b. It is the process of determining the size of the sample required to have a confidence interval of a certain width c. It is not of practical importance and is only useful in the classroom d. It is the prcoess by which we describe the sample with statistics e. It is the process by which we tell something about a population by looking at a representative sample 4. Of the following, which is the last step involved in the hypothesis testing process? a. Calculate the point estimate b. Identify the null and alternative hypotheses c. Calculate the test statistic d. Set the significance level for your hypothesis e. Make a conclusion 5. Which of the following statements about hypothesis testing is true? a. is the chance that we do not reject the null hypothesis when the null hypothesis is false b. If the test statistic is more extreme than the p-value then we reject the null hy- pothesis c. If we do not reject the null hypothesis then the null hypothesis is definitely true d. If we reject the null hypothesis then the null hypothesis could not possibly be true e. None of the above 2 Use the following information to answer the next 4 questions (6-9): Suppose you are part of an NGO which is investigating the impact of hygiene and sanitary conditions on the spread of gastroenteritis in rural Africa. It is postulated that washing hands prior to cooking and intake of food, by more than half the population, reduces the...
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This note was uploaded on 07/19/2010 for the course ECON ECON203 taught by Professor Petry during the Spring '10 term at University of Illinois at Urbana–Champaign.

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Fall09Midterm1B - Midterm 1 - Form B - Fall 2009 Economics...

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