Chapter 3 Relationships Between Quantitative Variables Copyright ©2011 Brooks/Cole‚ Cengage Learning 1 Principle Idea: The description and confirmation of relationships between variables are very important in research. Copyright ©2011 Brooks/Cole‚ Cengage Learning 2 Three Tools we will use … • Scatterplot‚ a two-dimensional graph of data values • Correlation‚ a statistic that measures the strength and direction of a linear relationship between two quantitative variables
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1. Arrange the following in descending order: a. 29 ‚23 ‚821 b. 15 ‚37 ‚710 2. A rectangular sheet of paper is 1212 cm long and 1023 cm wide. Find its perimeter. 3. Salil wants to put a picture in a frame. The picture is 735 cm wide. To fit in the frame the picture cannot be more than 7310 cm wide. How much the picture should be trimmed? 4. Find the perimeters of (i) ABE (ii) the rectangle BCDE in the figure below. Whose perimeter is greater? 5. In
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Week 5 - Discussion 1 This Discussion will give you the opportunity to calculate or identify the three measures of central tendency. You will be asked to select an appropriate real life situation in which one measure would be more appropriate than the other two measures of center. 1. Select a topic of interest to you and record the topic in your posting‚ for example: “What is the average number of hours people watch TV every week?” Make sure the question you ask will be answered with a number‚
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Kelly Panizza Assignment # 1 Algorithm-Spring 2011 1. Do some research on al-Khorezmi (also al-Khwarizmi)‚ the man from whose name the word “algorithm” is derived. In particular‚ you should learn what the origins of the words “algorithm” and “algebra” have in common. R: / the word “Algorithm” or “Algorism” in some other writing versions‚ comes from the name Al-Khwarizmi (c. 780-850)‚ a Persian mathematician‚ astronomer‚ geographer
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DBE/2011 VRAAG 1/QUESTION 1 1.1.1 5 3x + 2 25 2x – 1 .5 x-3 .5 1.1.4 4 - 81 + 1250 1 1 2(-) 4() =2 –3 +1 = 2– 1 – 3 3 + 1 1 = – 27 + 1 1 = – 25 1 1.2.1 4.3x = 36 (5) ∴4.3x = 36 4 4 ∴3x = 9 1 ∴3x = 32 1 ∴x = 2 1 1.2.2 16-x = 2 1 4(- x) =2 ∴2 (3) ∴ 2-4x = 2 ∴-4x = 1 1 ∴-4x = 1 -4 -4 ∴ x = - 1 (5) (3) [23] (3) (4) - = 53x + 2. 5x - 3. 5 52(2x – 1) 1 = 53x + 2. 5x - 3. 5 54x – 2 1 =5 3x + 2 + x – 3 + 1 – 4x + 2 = 52 1 = 25 1 1.1.2 3x + 3x + 2 3x + 1 = 3x + 3x .32
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1. C (2‚0‚-3‚5‚10) v(0‚1)=1.25 v(1‚2)=1.25 ; v(2‚1) = 1/1.25 = 0.8 v(2‚3)=1+1=2 ; v(3‚2)=1/(1+1)=0.5 v(3‚4)=1+1=2 ; v(4‚3)=1/(1+1)=0.5 The smallest payment at time 1 = 2v(0‚1) + (-3) v(2‚1) + 5v(3‚2)v(2‚1) + 10v(4‚3)v(3‚2)v(2‚1) = 2(1.25) + (-3)(0.8) + 5 (0.5)(0.8) + 10(0.5)(0.5)(0.8) = 2.5-2.4+2+2 = 4.1 The smallest payment you would accept is 4.1. 2. Let K be the initial payment.
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Christmas 2010 | | | | | | | | | | | Dr. Fiona Lawless | | | | | | | Answer any FOUR questions | All questions carry equal marks | | | | DO NOT TURN THIS PAGE UNTIL INSTRUCTED | Question 1. (a) The following 20 numbers relate to response times recorded when the new Carrolls network was being tested: 30.9 | 41.1 | 1.2 | 30.6 | 35.2 | 25.8 | 15.0 | 35.8 | 32.9 | 20.7 | 29.7 | 12.4 | 32.7 | 33.5 | 21.6 | 38.9 | 33.2 |
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America ranks thirty-second in math. It is because students fail to see the benefits of math. The average scholar is more interested in extracurricular activities. While these activities are enjoyable and can be educational‚ we must not stray away from the core subjects. Out of the core subjects’ math ranks supreme in most aspects. Math can be cumbersome at times‚ yet it allows for a more enjoyable job and life. When it comes to school subjects‚ Math is the superior choice since
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Debbie Cao IB Chemistry 12 Pressure/Volume of Air Full Lab Write Up Introduction: According to Boyle’s Law‚ the volume of any given amount of gas held at a constant temperature varies inversely with the applied pressure. In other words‚ when the pressure increases the volume decreases. When pressure decreases‚ volume increases. This can be derived from the following equation: P1 V1=P2 V2 The common use of this equation is to predict how a change in pressure or volume will alter the
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Biology IB Standard Level 2012-2014 Index Topic 1 Topic 2 Topic 3 Topic 4 Topic 5 Topic 6 Topic 7 Topic 8 Topic 9 Topic 10 Topic 11 Statistical analysis Cells The chemistry of life Genetics Ecology and evolution Human health and physiology Nucleic acids and proteins Cell respiration and photosynthesis Plant science Genetics Human health and physiology Topic
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