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# class notes0006 - IPHY2800 PRACTICE QUESTIONS AND EXAMPLES...

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IPHY2800 PRACTICE QUESTIONS AND EXAMPLES FOR LECTURES 8 & 9 ~hich of the following would LEAST likely result in norm.allY.diStribu.ted data? ~ge of 5000 individuals when suffering first heart attack (-J ~ Ie -e \A...; B. Heights of 5000 ten year old boys ~ 5 0,)')' e o. Do e e \J (2. ¥l d\ S 4 C. Number of pull-ups done by 5000 sixteen year old boys - S o,jY e c.~ Cj (l D. Percent fat of 5000 sixteen year old girls '. s 0 Yv (' ,:", (J' 2. Which of the following would be the MOST representative sample? ~iased,N=100 Jk Biased, N=1000 .C. Unbiased, N=1O ~nbiased, N=20 3. Which of the following represents the WORST performance? A. Percentile rank of 49 V\A' d d \ e . ,e -;;. 0 ( i) f .. B. Stanine score of 5 VVI' d c l ~ 'Z- <;, @T-scoreof39 D. z score of -0.8 / / / ~ . ., is.) ''.:J. ,<;(0'(" 4. Given the following information, what is the 99% confidence interval containing the population mean? X = 60, S = 14, N = 49 C5<6' (fliT) @4.84-65.16 qq I -4 2 \~e . For the following problems assume the data are normally distributed )(=75 S=9 N=36 , , 5. What is the z score ofa raw score of80? 'i?0 -l5 = 5/'"1 -=_,55; 10 z. t S 0 ~ fZO~3) 6. What is the T-score for a raw score of87?~7 -1 S ::. 12../ '1 - I :s ;;; ,:::. I ! 3 -;>,) " SO L.__ 7. What is the percentile rank for a raw score of 82? 1 '8 8. What is the standard error of the mean? 1.5 9. What is the 95% confidence interval containing the mean of the population from which this sample was taken? l? ±. It. q (0 ) (\.5) 10. What is the 95% confidence interval containing the population mean ifthe sample size had been 25 instead of36? -, c:> t(\ .q lJ){ I .<i.) ZSCD'(L. ._ .•. _--_._-_ .. _-

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LA 2.D 3.e 4. B 60 'r2.58(147\Gi9) 5.0.55 (80-75)/9 6.63 50 + 10(87-75)/9 7.78 z =-1.82-75)/9= .77use TableAl 8. 1.5 9/136 9.72.15-77.85 75:1.96(1.5) 10.71.47-78.53 75~ 1.96(9/5) likelytobe negativelyskewed mustbe unbiased,biggerisbetter
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A PRACTICE TEST FOR CHAPTERS 1-3 1. Which of the following is NQI a variable? C (lV\ 0... c., <;. \A,\IVl e W\QIr e -\y111V\ 0 ¥1 G /~umber of bath tubs in a city ° &umber of players on a regulati,on rugby team, \J 0.\ \A t- ° C. Heart rate . ° D. Number of potato chips in o a bag

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