Central Measures Measures of central tendencies are nothing but the measures to describe the "central" values of a collected sample. For an ungrouped set of data these measures are: the mean‚ the median‚ and the mode. The Mean The arithmetic mean‚ or the simple mean‚ is computed by summing all numbers in an array of numbers (xi) and then dividing by the number of observations (N) in the array. ; the sum is over all i’s. The mean uses all of the observations‚ and each observation affects the
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BUILDING BACKGROUND KNOWLEDGE CHAPTER 4: Characteristics of Effective Direct Vocabulary Instruction Characteristic 1: Effective vocabulary instruction does not rely on definitions. Definitions are conventions we use to talk about words. Students’ ability to construct a definition was related more to their familiarity with the structure of definitions than it was to their comprehension ability. Recommendation: Words’ meanings be presented to students in everyday language. Characteristic
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the same (Fox‚ 1932). This discovery inspired a series of tasting experiment with more people; leading to the conclusion that the difference between tasters and non-tasters was not related to gender‚ age or race. PTC or Phenylthiocarbamide is a bimodal genetic trait‚ which means
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Week 1 Social networking seems to have taken over our lives! Almost everyone is on Facebook and Twitter. But is this a good thing? a. What advantages and disadvantages does social networking bring to your life and to society? b. How are businesses using social networking? kjhj Week 2 Think about how mobile our computing devices have become and the convergence of different devices such as cameras‚ phones‚ and computers. What do you think the computer of the future will be like? What capabilities will
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CHAPTER 1 Individuals are the objects described by a set of data. Individuals may be people‚ but they may also be animals or things. A variable is any change of an individual. A variable can take different values for different individuals. A categorical variable places an individual into one of several groups or categories. A quantitative variable takes numerical values for which arithmetic operations such as adding and averaging make sense. The distribution of a variable tells us what values
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The levels of measurement from the lowest to the highest level are nominal‚ ordinal‚ interval‚ and ratio Variables measured at the nominal level of measurement are at the lowest level and must follow three rules: (1) the data categories must be exhaustive (each datum will fit into at least one category identified by the researcher)‚ (2) the data categories must be exclusive (each datum will fit into only one category)‚ and (3) the data cannot be rank ordered. Nominal data differ from ordinal data
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Introduction The mechanism of human memory recall is neither a parallel nor a sequential retrieval of previously learned events. Instead‚ it is a complex system that has elements of both sequential and parallel modalities‚ engaging all of the sensory faculties of the individual. On an everyday level‚ issues about memory and recall affect everyone. It has a bearing on ramifications from the trivial to matters of life and death. Thus‚ a particular student might worry about his or her ability to
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What is central tendency? Explain three important measures of central tendency? • Measures of central tendency are scores that represent the center of the distribution. Three of the most common measures of central tendency are: – • Mean Median Mode – – The Mean The mean is the arithmetic average of the scores. – Mean is the average of the scores in a distribution _ X = _________ i N Σ Xi Mean Example Exam Scores 75 91 82 78 72 94 68 88
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Comm 307 Midterm Study Guide Types of Hypotheses: ⁃ tentative statement about the relationship between IV & DV ⁃ One-tailed ⁃ predicts the specific nature of the relationship or difference ⁃ EX: Females will talk more (higher word count) than males in mixed dyadic dinner conversations ⁃ Two-tailed ⁃ predicts significant relationship or difference‚ but does not indicate the specific nature of the relationship ⁃ EX: There is a significant difference in the
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Singapore - STAT1060 Business Decision Making Assignment 1 Tutorial Group: B3 Tutor: Alex Soon Complete by: Liu Yilin & Liao Jing Question 1 (8 marks) A small greengrocery is very popular with the local residents. Honey is one of the commodities that customers find particularly appealing and accordingly its sales are high. However the supplier of a locally produced honey “Bees Knees” is questioning why sales of this brand at the greengrocery are so poor when compared
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