EBook Problems EDA Shape - Revision history

66.87.136.19: /* Problem 4 */

2014-03-05T12:03:26Z

‎Problem 4

JayZzz at 19:48, 8 January 2009

2009-01-08T19:48:51Z

JayZzz at 00:47, 4 January 2009

2009-01-04T00:47:23Z

JayZzz at 07:45, 3 January 2009

2009-01-03T07:45:11Z

JayZzz at 06:20, 4 December 2008

2008-12-04T06:20:44Z

JayZzz: New page: == EBook Problems Set - Measures of Shape== ===Problem 1=== 46% of the likely voters in Los Angeles intend to vote for Ma...

2008-12-04T06:20:07Z

New page: == EBook Problems Set - Measures of Shape== ===Problem 1=== 46% of the likely voters in Los Angeles intend to vote for Ma...

New page

==[[EBook_Problems | EBook Problems Set]] - [[AP_Statistics_Curriculum_2007_EDA_Shape | Measures of Shape]]==

===Problem 1===
46% of the likely voters in Los Angeles intend to vote for Mayor James. Suppose we take a random sample of 1000 likely Los Angeles voters. For every person in our sample who intends to vote for Mayor James we will record a "1". For every person who will not vote for the mayor, we will record a "0". Suppose we now make a histogram of our results. Which of the following is a good description of the histogram?

*Choose one answer.

:''(a) The distribution will have a spike at the value 0.46

:''(b) The distribution will be approximately normal

:''(c) The sample size is too small to tell

:''(d) The distribution will show about 46% of the replies at 1 and 54% at 0
{{hidden|Answer|(d)}}

<hr>
* [[Ebook | Back to Ebook]]
* SOCR Home page: http://www.socr.ucla.edu

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 * [[Ebook | Back to Ebook]]
-* SOCR Home page: http://www.socr.ucla.edu
+* SOCR Home page: http://www.socr.umich.edu
-{{translate|pageName=http://wiki.stat.ucla.edu/socr/index.php/EBook_Problems_EDA_Shape}}
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← Older revision		Revision as of 19:48, 8 January 2009
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	:''(d) One categorical and one quantitative		:''(d) One categorical and one quantitative
	{{hidden\|Answer\|(a)}}		{{hidden\|Answer\|(a)}}
		+
		+	===Problem 4===
		+	Imagine that students find a recent 10 point quiz very easy and almost all do very well. Describe the shape of distribution of scores when you plot the scores on this quiz.
		+
		+	*Choose one answer.
		+
		+	:''(a) The distribution of scores is skewed left since some students did not do well.
		+
		+	:''(b) The distribution of scores is bimodal since some students did well and some did not.
		+
		+	:''(c) The distribution of scores is nearly normal since quiz grades are curved.
		+
		+	:''(d) It is not possible to describe the shape of the distribution unless you have the actual values.
		+
		+	:''(e) The distribution of scores is skewed right since some students did not do well.
		+	{{hidden\|Answer\|(a)}}

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 :''(c) There are two groups of waiting times, and in order to study this variable, we should analyze each group separately
 {{hidden|Answer|(a)}}
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← Older revision		Revision as of 06:20, 4 December 2008
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	* SOCR Home page: http://www.socr.ucla.edu		* SOCR Home page: http://www.socr.ucla.edu

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 :''(d) The distribution will show about 46% of the replies at 1 and 54% at 0
 {{hidden|Answer|(d)}}
 <hr>