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Unformatted text preview: 3. Given below are the times (in minutes) required by a sample of 5 children to learn a prescribed motor skill. 3 , 8 , 10 , 4 , 5 (a) Find the median. SHOW YOUR WORK! (2 pts) (b) Find the variance. SHOW YOUR WORK! (5 pts) 1 4. When a machine used to ll breakfast cereal boxes is operating correctly, the amount of cereal dispensed has an approximately bellshaped distribution with mean 12 ounces and standard deviation 0.2 ounces. If the machine is working correctly, what can you say about the percent of boxes into which the machine dispenses more than 12.4 ounces? SHOW YOUR WORK! (6 pts) 5. Suppose that a data set has a distribution that is skewed left. (a) Draw a rough sketch indicating the shape of this distribution. (1 pts) (b) Which of the following is most likely to be true for a distribution that is skewed left? (2 pts) (i) The mean and the median are equal. (ii) The mean is larger than the median. (iii) The mean is smaller than the median. 2...
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 Fall '08
 Ripol
 Statistics

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