Quiz 1 Name solutions
Math 243 GTF
April 3, 2009 Disc. Time
1. Suppose we are analyzing data on the yearly incomes of people living in Eugene. Which of the
following best describes the distribution?
(a) ๎
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Skewed right
(b) Skewed left
(c) Symmetric
(d) None of the above
2. The distribution of heights of NBA players is skewed left. If we were to calculate the mean
and median, which of the following would we expect to find?
(a) The mean to be significantly greater than the median.
(b) ๎
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The mean to be significantly less than the median.
(c) The mean to be approximately equal to the median.
(d) None of the above
3. The average adult American consumes 3700 calories per day. If caloric intake of adults in
America is approximately normally distributed with a standard deviation of 250 calories, and
Dan Wang eats 4500 calories per day, what is the z-score of his caloric intake?
z=4500 โ3700
250 = 3.2
