# Past Exam for STAT 100 - ELEM STAT & PROB at Maryland (UMD)

## Exam Information

 Material Type: Exam 1 Professor: Staff Class: STAT 100 - ELEM STAT & PROB Subject: Statistics and Probability University: University of Maryland Term: Spring 2003 Keywords: ProbabilitiesEither...orScatter DiagramCombinationsExpected ValuesThe IndependentCalculatorsIndependent EventsExclusive OrIndependence

## Sample Document Text

Stat lOO Exam lA Calculators allowed All work must be shown to receive full credit. 1. Eight students reported that the previous night they slept (in hours): 7 9 8 6 6 9 9 10. a) (9 pts) Calculate the sample mean, median, and standard deviation. Spring 2003 b) (9 pts) Ifeach student had reported sleeping one less hour, what would the mean, median, and standard deviation be? c) (7 pts) Create a dot diagram of the original data and mark the location of the median. 2. For the following five pairs of values: a) (5 pts) plot a scatter diagram b) (10 pts) calculate the equation of the regression line and draw it on the scatter diagram c) lOts) calculate the correlation coefficient and interpret the result o 3 5 8 9 3 5 4 6 3. A body shop currently has twelve automobiles in for repair work: three are imports and the remainder are domestic. Of the three imports, insurance companies will cover the cost of the repairs for only two. Insurance companies will not be covering the cost of r...

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