Review_S11-Exam1

# Review_S11-Exam1 - Exam1Spring2011Review

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Exam-1 Spring 2011 Review Use the following sample values to answer questions 1 through6. 5, 9, 8, 7, 11, 6 1. The sample mean is A.  7.67* B.  6.00 C. 7.50 D.  4.67 2. 1 The sample standard deviation is A. 7.67 B. 2.18* C. 4.67 D. 6.00 3. The mode is? A. 4.0 B. 7.5 C. 8.0 D. None* 4. The median? A. 8.0 B. 8.5 C. 7.5* D. 5.0 5. What is the Z-score of the data point 11? A. +2.48 B. -3.13 C. -5.83 D. +1.54* 6. What is the range of the data set? A. 6* 1

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B. 11 C. 26 D. 2 The following information is for the Questions 7 through 12. As part of a  research project a UNT student randomly interviewed 24 fellow students  about their monthly health insurance costs.  The goal was to estimate  the student insurance costs for all UNT students. Data below are in  \$/month. 98, 104, 104, 128, 144, 149, 152, 156, 166, 171, 173, 174 178, 181, 183, 185, 191, 197, 200, 211, 246, 281, 290, 300           Mean =  183.39     Std. Dev= 54.88 7. Using the data above, what is the 80 th  percentile? A. 209.5 B. 166.0 C. 211.0* D. 172.5 8. The 38 th  Percentile is: A. 171.0* B. 150.5 C. 166.0 D. 202.0 9. The Z-score for the data point 290 is: A. -0.85 B. +1.00 C. -1.77 D. +1.94* 10. The Median of these data is: 2
A.   0 B. 290 C. 178 D. 176*

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## This note was uploaded on 04/15/2011 for the course DSCI 2710 taught by Professor Hossain during the Spring '08 term at North Texas.

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Review_S11-Exam1 - Exam1Spring2011Review

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