# Lecture Notes for STAT 2004 - Introductory Statistics at Virginia Tech (VT)

## Notes Information

 Material Type: Review Sheet 7 Professor: Staff Class: STAT 2004 - Introductory Statistics Subject: Statistics University: Virginia Polytechnic Institute And State University Term: Fall 2006 Keywords: Following ValuesThe IndependentIndependent EventsNo CorrelationStandard DeviationInterpretationExperimentsData AnalysisInterquartile RangeRandom Sample      ## Sample Document Text

1. Given the following information, what is the standard deviation?  x = 22  x 2 = 132 n = 5 Given the following values, what is the 33rd percentile? X: 1 3 5 2 8 2. 3. If Q1 = 25, median = 84.0, and P75 = 100. What is the Interquartile Range and how much of the data does it cover (or span) respectively? 4. Given the following information: x = 22 (x2) = 132 y = 17 Find the correlation coefficient (y2)= 89 (xy) = 61 n=5 5. The average age in college is 20 years old with a standard deviation of 1.2 years. About how many people would there be between 18.8 and 21.2 years old? 6. Given the information from #4 What is a and b from the regression equation respectively? 7. The marks on a statistics test are normally distributed with a mean of 62 and a variance of 225. If the instructor wishes to assign A's or higher to the top 20% of the students in the class, what mark is required to get an A? 8. X is normally distributed with a mean of 100 and standard deviation of 20. What is the prob...

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