# Past Exam for STAT 4714 - Prob & Stat for EE with Glynn at Virginia Tech (VT)

## Exam Information

 Material Type: Exam 3 Professor: Glynn Class: STAT 4714 - Prob & Stat for EE Subject: Statistics University: Virginia Polytechnic Institute And State University Term: Spring 2006 Keywords: ObservationApplicationConditionalQuestionnaireStandard DeviationInterquartile RangeRandom SampleEngineeringRandom VariablesSample Size

## Sample Document Text

1. 2. 3. 4. Given the values 9, 4, 4, 1,3,6. What is the 70 th percentile? a. 4.2 CE:]) c. 5 d. 4 e. 3 f. 1 L ~( f. . .. A questionnaire about study habits was given to a random sample of students taking a large introductory statistics class. The sample of 25 students reported that they spent an average Of 80 minutes per week studying statistics. Assume that the population standard deviation is 35 minutes. What is the 92% confidence,m.,teo::al for the average time studying? .,..J. .... - . ~ ca::.{~ZJ5-.. ()1721r 39~~~ b. (68.49,91.52) r c. (67.82,92.18) d. (67.68,92.32) e. (66.28, 93.28) The population standard deviation was used to make the following 95% confidence interval (4.02,5.98). What is the 90% confidence interval? ~ __ (4.12Q_,2, 8 80) C!L.....(±..1]~.>J~~ .. ::> c. (4.360,5.640) d. (3.713,6.288) f(x,y) = 2 where 0< y < x < 1. What is fXI Y ? rf.) l/(l-y) (A( /...., _ 1.,,1 '1 ~ l/x ~ )y L -~, c. 1 () <;K ". LX. I 7 .... - ...

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