Statistics homework solutions ch 4, Assignments of Statistics

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Chapter 4 Homework Problems 1. In words, explain What is measured b "Moog ure \ ~ mae > +a Suen OF Sg Uared) ) Orns y each of the following: AA Ae na OER af &% Uaredl Cleujioctions Cc. Standard deviation Maton WEASUVES 14 “ am divine = ee Wetween tne Ycorep > re mo a ry 3. Isit en to obtain a negative value for the variance or the standard deviation? ne ee Me AEVIEIANON 1S PSEVCI as ™) O¥ Wuares Oc de vicion Mean +e Fore, com S4aa | . - YaNclavroal” ClevaKon DORMS wed ly of Vananw SE Ontie a0 we 5. Explain why the formulas for sample variance and populati i i pulation variance are different. ; 2) ; f Sample \r Ste Soo Ove Bie ven+-\p 4 ne prey. gu sec? igmos inwe at Wes Vio} 4 © toes Mos neta de oll scarce 7. Onan exam with amean of M = 78, you obtain a score of X = 84. a. Would you prefer a standard deviation of s = 2 ors = 10? (Hint: Sketch each distribution and find the location of your score.) b. If your score were X = 72, would you prefers = 2ors = 10? Explain your answer. 8) iS] LHL