samplefinal_spring06

samplefinal_spring06 - Instructor_ Class Meeting Time_...

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Instructor____________________ Name_______________________ Class Meeting Time___________ Red Id:____________________ STAT 119 FINAL EXAM May 13, 2006 Form A You have two hours to complete this exam. Mark your answers neatly on the exam and be sure to show all your work . Please round your answers to four digits after the decimal. Make sure to put your final answers neatly within the answer boxes (when provided). Please CIRCLE the correct answer and use CAPITAL LETTERS in the space provided for the multiple choice. BE CAREFUL! GOOD LUCK! Page 1 Total________ Page 2 Total________ Page 3 Total________ Page 4 Total________ Page 5 Total________ Page 6 Total________ Page 7 Total________ Page 8 Total________ Page 9 Total________ Page 10 Total________ Page 11 Total________ Page 12 Total________ Total_____________________
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Use the following information to answer problems 1-2 (19 points): The Florida Fruit Supply Company uses bottles that are labeled as containing 23 oz of orange juice. A random sample of 18 such bottles shows that the sample mean and standard deviation are 22.75 oz and 0.64 oz, respectively. Test the claim that the bottles contain an average of 23 oz. D. (3 points) State the appropriate null and alternative hypotheses. E. Conduct a test of the hypotheses identified above. I. (6 points) Calculate the test statistic Answer: II. (4 points) Calculate the corresponding p-value. Answer: III. (3 points) Make a statistical decision using level of significance of 0.05. Justify your decision. IV. (3 points) Interpret your decision in the context of the problem. F. (4 points) A machine is designed to produce rubber gaskets. The standard deviation is known to be 0.01 in. How many gaskets should be measured to be able to estimate the mean with a margin of error of 0.001 in. and 90% level of confidence? Answer:
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Total: ________(23) Use the following information to answer problems 4-5 (10 points): The data are from the Institutional Research department of the Foothill-De Anza Community College District for De Anza College American Indian Asian/Pacific Islander African American Hispanic White Undeclared TOTAL Administrator 0 3 5 5 21 0 34 Staff 1 35 21 30 201 16 304 Faculty 3 58 14 45 141 17 278 TOTAL 4 96 40 80 363 33 616 Suppose that one De Anza College employee is randomly selected. G. (5 points) Find P (employee is Staff OR Hispanic) Answer: H. (5 points) Find P (employee is an Administrator GIVEN the employee is African American) Answer: Use the following information to answer problems 6-7 (10 points): A headache remedy is said to be 80% effective in curing headaches caused by simple nervous tension. This remedy is used on 100 randomly selected patients suffering from nervous-tension headaches. I.
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This note was uploaded on 05/04/2008 for the course STAT 119 taught by Professor Helen during the Fall '07 term at San Diego State.

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samplefinal_spring06 - Instructor_ Class Meeting Time_...

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