EBook Problems Infer 2Means Indep - Revision history

Tdlee: Text replacement - "{{translate|pageName=http://wiki.stat.ucla.edu/socr/" to ""{{translate|pageName=http://wiki.socr.umich.edu/"

2020-03-03T16:38:32Z

Text replacement - "{{translate|pageName=http://wiki.stat.ucla.edu/socr/" to ""{{translate|pageName=http://wiki.socr.umich.edu/"

IvoDinov at 16:26, 26 October 2009

2009-10-26T16:26:50Z

JayZzz at 06:45, 31 December 2008

2008-12-31T06:45:46Z

JayZzz at 05:11, 31 December 2008

2008-12-31T05:11:44Z

JayZzz at 05:05, 31 December 2008

2008-12-31T05:05:25Z

JayZzz: New page: == EBook Problems Set - Inferences About Two Means: Independent Samples Problems== ===Problem 1=== A researc...

2008-12-02T08:28:57Z

New page: == EBook Problems Set - Inferences About Two Means: Independent Samples Problems== ===Problem 1=== A researc...

New page

==[[EBook_Problems | EBook Problems Set]] - [[AP_Statistics_Curriculum_2007_EDA_Infer_2Means_Indep | Inferences About Two Means: Independent Samples]] Problems==

===Problem 1===
A researcher wants to compare all students at Kansas State University (population = 22,000) with all residents of the city of Springfield, IL (population = 22,000). He wants to estimate the average age of each population using two separate samples. He wants the same margin of error for each of his sample means. How would the size of the two samples compare?

*Choose at least one answer.

:''(a) the sample sizes should be the same since the population sizes are the same.

:''(b) No way to tell.

:''(c) The KSU sample should be smaller than the Springfield sample.

:''(d) The KSU sample should be larger than the Springfield sample.
{{hidden|Answer|(c)}}

<hr>
* [[AP_Statistics_Curriculum_2007_EDA_Infer_2Means_Indep | Back to Ebook]]
* SOCR Home page: http://www.socr.ucla.edu

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	* SOCR Home page: http://www.socr.ucla.edu		* SOCR Home page: http://www.socr.ucla.edu

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← Older revision		Revision as of 16:26, 26 October 2009
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−	==[[EBook_Problems \| EBook Problems Set]] - [[~~AP_Statistics_Curriculum_2007_EDA_Infer_2Means_Indep~~ \| Inferences About Two Means: Independent Samples]] Problems==	+	==[[EBook_Problems \| EBook Problems Set]] - [[AP_Statistics_Curriculum_2007_Infer_2Means_Indep \| Inferences About Two Means: Independent Samples]] Problems==

	===Problem 1===		===Problem 1===

← Older revision		Revision as of 06:45, 31 December 2008
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	:''(d) Two-sample t		:''(d) Two-sample t
		+	{{hidden\|Answer\|(a)}}
		+
		+	===Problem 4===
		+	In a study of graduate students who took the Graduate Record Exam (GRE), the Educational Testing Service reported that for the quantitative exam, U.S. citizens ha da mean of 529 and a standard deviation of 127, whereas the non-U.S. citizens had a mean of 649 and a standard deviation of 129. Choose the best answer from the following.
		+
		+	*Choose one answer.
		+
		+	:''(a) Both groups had about the same amount of variability in their scores, but non-U.S. citizens performed better, on the average, than U.S. citizens.
		+
		+	:''(b) A non-U.S. citizen who scored three standard deviations below the mean had a score of 200.
		+
		+	:''(c) If the scores range between 200 and 800, then probably the scores for non-U.S. citizens were symmetric and bell shaped.
		+
		+	:''(d) If the distribution of scores was approximately bell-shaped, then almost no U.S. citizens scored below 400.
	{{hidden\|Answer\|(a)}}		{{hidden\|Answer\|(a)}}

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	:''(e) Use a chi-squared test of association		:''(e) Use a chi-squared test of association
		+	{{hidden\|Answer\|(a)}}
		+
		+
		+	===Problem 3===
		+	Suppose you were hired to conduct a study to find out which of two brands of soda college students think taste better. In your study, students are given a blind taste test. They rate one brand and then rated the other, in random order. The ratings are given on a scale of 1 (awful) to 5 (delicious). Which type of test would be the best to compare these ratings?
		+
		+	*Choose one answer.
		+
		+	:''(a) Paired difference t
		+
		+	:''(b) Chi-square
		+
		+	:''(c) One-sample t
		+
		+	:''(d) Two-sample t
	{{hidden\|Answer\|(a)}}		{{hidden\|Answer\|(a)}}

@@ Line 14: / Line 14: @@
 :''(d) The KSU sample should be larger than the Springfield sample.
 {{hidden|Answer|(c)}}
 <hr>
-* [[AP_Statistics_Curriculum_2007_EDA_Infer_2Means_Indep | Back to Ebook]]
+* [[EBook | Back to Ebook]]
 * SOCR Home page: http://www.socr.ucla.edu
-{{translate|pageName=http://wiki.stat.ucla.edu/socr/index.php?title=EBook_Problems_EDA_Infer_2Means_Indep}}
+{{translate|pageName=http://wiki.stat.ucla.edu/socr/index.php/EBook_Problems_Infer_2Means_Indep}}