CI for pop mean: x±z*(σn) n=(z*σME)2 Reduce ME 1. Lower confidence 2. reduce σ ------------------------------------------------- 3. increase n HT for pop mean ------------------------------------------------- z=x-μσ√n Errors I=P(reject H0/H0 true)=α II=P(accept H0/H0 wrong) Power=1-β Increase pow 1. increase α 2. consider alternative µ that is farther than hypothesized µ 3.increase n ------------------------------------------------- 4.decrease σ One sample t CI x±t*s√n One
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How Statistics benefit the medical field or something. Definition: Statistics refer to the collection‚ organization and analysis of quantitative data. Statistics‚ like numerical data or an observation that describe the characteristics of a specific population‚ has more than a fair amount of importance to the doctors‚ technology and its patients The Medical field is expanding due to factors like the increased population and demands. As a result of this‚ medical administrators are using statistics
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Ivory Koehn 9/10/2010 Descriptive Essay Under The Raised Hand Prologue When I was a young girl learning about life and love‚ I always thought that some man would sweep me off my feet and it was my fate to be with him and only him. My mother was not a big fan of love and fate. She didn’t have a very good history of guys and relationships. She would always tell us love was not a reality and we should find someone with a lot of money. My mother is a strong feminist woman and I tried as hard
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1 LANGLEY HIGH SCHOOL 2013 AP STATISTICS SUMMER ASSIGNMENT Welcome to AP Statistics! You have selected a course unlike any other math course. The purpose of this Summer Assignment is to: 1. Give you information on what to expect‚ and how this course is different from other math courses. 2. Refresh your knowledge on statistics topics that you should know prior to this course. 3. Give you a chance to demonstrate your ability to analyze data and write conclusions. The Assignment is divided
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November 19‚ 2010 NAME: The Statistics of Poverty and Inequality TYPE: Sample SIZE: 97 observations‚ 8 variables DESCRIPTIVE ABSTRACT: For 97 countries in the world‚ data are given for birth rates‚ death rates‚ infant death rates‚ life expectancies for males and females‚ and Gross National Product. SOURCES: Day‚ A. (ed.) (1992)‚ _The Annual Register 1992_‚ 234‚ London: Longmans. _U.N.E.S.C.O. 1990 Demographic Year Book_ (1990)‚ New York: United Nations. VARIABLE DESCRIPTIONS: Columns 1 -
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1) Suppose that an independent laboratory has tested trash bags and has found that no 30-gallon bags that are currently on the market have a mean breaking strength of 50 pounds or more. On the basis of these results‚ the producer of the new‚ improved trash bag feels sure that its 30-gallon bag will be the strongest such bag on the market if the new trash bag’s mean breaking strength can be shown to be at least 50 pounds. The mean of the sample of 40 trash bag breaking strengths in Table 1.9 is x=50
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Descriptive Words Smile‚ grin‚ beam‚ smirk . . . Frown‚ scowl‚ glare‚ glower‚ grimace . . . Stare‚ gaze‚ gape‚ watch‚ gawk‚ ogle‚ look‚ examine‚ leer . . . Flinch‚ recoil‚ balk‚ cringe‚ shy away‚ pull back‚ wince‚ cower‚ shrink‚ tremble . . . Incredulous‚ disbelieving‚ skeptical‚ doubtful‚ dubious‚ uncertain‚ suspicious‚ questioning‚ vague . . . Quizzical‚ questioning‚ puzzled‚ surprised‚ perplexed‚ inquiring Interested‚ curious‚ involved‚ attentive‚ concerned‚ attracted‚
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Descriptive Essay Hearts were racing‚ twelve to be exact‚ lungs were being constricted tighter and tighter with every second that went by‚ joints were being pushed to their limits as their limbs stretched the farthest they could reach‚ and yet these twelve people were still able to ignore their injuries. All they revealed was happiness. There was no pain to be seen. No acknowledgement of misery because they all knew they only had those two minutes and thirty seconds to give it their all. Any sense
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Chapter 3 Fluid Statics: Definitions Statics: ∑F = 0. In statics we have only pressure as surface force and weight as body force. Thus‚ when fluids are still‚ the pressure is balanced by the fluid weight. No relative motion between adjacent fluid layers. Shear stress is zero Only _______ can be acting on fluid surfaces Gravity force acts on the fluid (____ force) Applications: Pressure variation within a reservoir Forces on submerged surfaces Buoyant forces 9/4/2013 1 Pressure Pressure is defined
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• Defining What Statistics Really Is 1.1 Nature of Statistics The term “Statistics” came from the Latin word ‘status’ which could be translated as ‘state’. The usage of this term only became popular during the 18 th century where they defined Statistics as “the science of dealing with data about the condition of a state or community”. The practice of statistics could be traced back even from the early biblical times where they gather figures related to governance of the state for they realized
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