1.2 solutions

1.2 solutions - Stat 133 Recitation Section 1.2 SOLUTIONS 1.

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Stat 133 Recitation Section 1.2 SOLUTIONS 1. In a histogram, the proportion of the total area which must be to the left of the median is:  a. exactly 0.50 b. less than 0.50 if the distribution is skewed to the left c. more than 0.50 if the distribution is skewed to the right d. between 0.25 and 0.60 if the distribution is symmetric and unimodal 2. Which of the following statements is true?  a. When the distribution is skewed to the left,: mean > median   b. When the distribution is skewed to the right:  mean < median  c. When the distribution is symmetric and bell shaped: mean = median  d. When the distribution is symmetric and has two humps or peaks: mean =  median  3. Which  of   the  following  summary   measures  cannot   be   easily   approximated  from   a  boxplot? a. The range b. The interquartile range c. The second quartile d. The standard deviation e. All of the above 4. The length of the box in the boxplot portrays the: a. median b. interquartile range c. range d. third quartile 5. The standard deviation will always be less than or equal to the variance. TRUE FALSE If the variance is a number between 0 and 1 then the standard deviation  (square root of the variance) gets larger. 6.

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This note was uploaded on 01/05/2012 for the course STAT 133 taught by Professor Rumseyjohnson during the Fall '07 term at Ohio State.

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1.2 solutions - Stat 133 Recitation Section 1.2 SOLUTIONS 1.

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