Sample Midterm

# Sample Midterm - SAMPLE MIDTERM EXAM STAT 53-10 Spring 2006...

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SAMPLE MIDTERM EXAM STAT 53-10 Spring 2006 Answer all the questions. Please show full work for partial credit. 1) Consider the following data on the number of hits to a Library website on 14 randomly picked days: 390 406 446 420 370 328 410 320 368 392 280 325 382 290 (a) (12 points) Construct a box plot for the above data? (b) (4 points) Is the distribution symmetric? Explain. 2) (18 points) The number of passengers in a car on a freeway is a random variable with the following probability distribution: X 1 2 3 4 5 P(x) 0.4 - 0.15 0.1 0.05 (a) Find the probability that there are at most two passengers in a car (b) Find the mean number of passengers in a car. (c) Find the probability that the number of passengers in a car is within 1 standard deviation from the mean. 3) (15 points) A study of the behavior of large number of drug offenders after treatment for drug abuse suggests that the likelihood of conviction within a two- year period after treatment may depend on the offender’s education. The

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## This note was uploaded on 04/07/2008 for the course STAT 053 taught by Professor Balaji during the Spring '06 term at GWU.

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Sample Midterm - SAMPLE MIDTERM EXAM STAT 53-10 Spring 2006...

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