Exam Information
Material Type:  Final 
Professor:  Staff 
Class:  960 211  STATISTICS I 
Subject:  STATISTICS 
University:  Rutgers University 
Term:  Spring 2003 
Keywords:   Significance
 Level of Significance
 Following Values
 Definitions
 Sampling Error
 Prescription
 Interpretation
 Individuals
 Point Estimate
 Significance Level

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Sample Document Text
960:211:01 Spring 2003
Elementary Statistics I
Review Problems for the Final Exam
1. Know your terms and definitions, and study Quizzes #2 through #4. Use the review sheet
for Exam #2 as a study guide for the material in Chapters 45.
2. A random sample of 76 children between the ages of 4 and 5 are taken, and their weights
were measured. The sample mean was 34.5 pounds, and the sample standard deviation was
2.74 pounds.
(a) Compute a 90% confidence interval for the true mean weight of children between the
ages of 4 and 5.
(b) Compute a 95% confidence interval for the true mean weight of children between the
ages of 4 and 5.
(c) In reference to parts (a) and (b), which interval is wider? Why is that the case?
(d) Compute the needed sample size to estimate the true mean weight of children between
the ages of 4 and 5 with a maximum error tolerance of 1 pound at 95% confidence.
3. CNN has just conducted a poll and wants you to analyze the results. Seven hundred
people were asked how th...
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