Principles_of_Statistics_-_Exam_1

# Principles_of_Statis - Principles of Statistics First Examination Fall 2007 Name Date Instructions Answer ALL the questions in the blue book There

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Principles of Statistics First Examination – Fall 2007 Name: Date: Instructions: Answer  ALL  the questions in the blue book. There is no need to write an explanation for the true or false questions or for the  multiple-choice questions. For the problems, you must show your work. Answers  stating just the final result will not be considered a correct answer. Be sure to  clearly state your answer when needed. Do not just show the numerical results if  an interpretation is needed or asked for. Good luck. True or False Questions (2 points each question): 1. The Median is very sensitive to extreme values. 2. The probability of a sample space is one. 3. If A and B are mutually exclusive events, then  P ( A U B ) =  P ( A ) +  P ( B ). 4. Cross sectional data represent a different individual unit at the same point in time. 5. A data set is skewed to the left if the mean is greater than the median. 6. If you know the range of a data set that is from a normal distribution, you can estimate  the standard deviation as the range divided by 6 7. The third quartile is the median of the upper 50% 8. If A and B are two regular events, can you say without making any assumptions that  P(A B)=P(A)P(B)

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## This note was uploaded on 04/11/2008 for the course ECONOMICS 290 taught by Professor Medina during the Spring '07 term at CUNY City.

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Principles_of_Statis - Principles of Statistics First Examination Fall 2007 Name Date Instructions Answer ALL the questions in the blue book There

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