Modelling 2 Week 3: Discrete Random Variables Stephen Bush Department of Mathematical Sciences MM2: Statistics - Week 3 - 1 Random Variables • Reference: Devore § 3.1 – 3.5 • Definitions: • An experiment is any process of obtaining one outcome where the outcome is uncertain. • A random variable is a numerical variable whose value can change from one replicate of the experiment to another. • Sample means and sample standard deviations are random variables • They are different from sample
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THE THIRD-VARIABLE PROBLEM Correlational data are frequently misinterpreted‚ especially when presented by newspaper reporters‚ talk-show hosts‚ or television newscasters. The Most common problem in interpreting correlations is Third-Variable Problem. A correlation simply indicates that there is a weak‚ moderate‚ or strong relationship (either positive or negative)‚ or no relationship‚ between two variables. When interpreting a correlation‚ it is also important to remember that although the correlation
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Eric Scantlebury NT1310 Physical Networking Unit 3 Assignment 1: Specifications - Definitions 4/10/14 Application Describes cables‚ fire ratings and shielding Unshielded Twisted Pair (UTP) Types of Ethernet and phone cables twisted around each other to decrease interference from EMI. Has no shielding. Shielded Twisted Pair (STP) Same as the UTP cables except it is shielded in a metal sheath around it to stop external interference. Fiber-Optic Cable A cable that uses glass to transmit data using
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The Exegesis of Exodus 21:1-11 The Law concerning Slaves 1These are the ordinances that you shall set before them: 2When you buy a male Hebrew slave‚ he shall serve six years‚ but in the seventh he shall go out a free person‚ without debt.3If he comes in single‚ he shall go out single; if he comes in married‚ then his wife shall go out with him.4If his master gives him a wife and she bears him sons or daughters‚ the wife and her children shall be her master ’s and he shall go out alone.5But
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SIDS31081 - Statistics Refresher 2006 – 2007 Exercises (Probability and Random Variables) Exercise 1 Suppose that we have a sample space with five equally likely experimental outcomes : E1‚E2‚E3‚E4‚E5. Let A = {E1‚E2} B = {E3‚E4} C = {E2‚E3‚E5} a. Find P(A)‚ P(B)‚ P(C). b. Find P(A U B) . Are A and B mutually exclusive? c. Find Ac‚ Bc‚ P(Ac)‚ P(Bc). d. Find A U Bc and P(A U Bc) e. Find P(B U C) Exercise 2 A committee with two members is to be selected from a collection of 30
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The Case of the Variable Laminates The Case of the Variable Laminates Grantham University Experimental design is “a formal plan that details the specifics for conducting an experiment‚ such as which responses‚ factors‚ levels‚ blocks‚ treatments‚ and tools are to be used” (Sower 2010). An experiment where one variable is studied while the other variables are held constant can be inefficient and suffers from the inability to assess interactions among the variables as well as the interaction
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DEMOGRAPHIC TRANSITION THEORY INTRODUCTION Demographic transition theory is the theory that societies progress from a pre-modern regime of high fertility and high mortality to a post-modern regime of low fertility and low mortality. The theory is explained by a model which is an idealized picture of demographic change. The aim of the theory is to explain why a society moves from high mortality and fertility to low mortality and fertility. Demographic transition is the actual change from high
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SOCIAL CLASS CANNOT BE MEASURED/DETERMINED "A social class is a group of people of similar status‚ commonly sharing comparable levels of power and wealth. In sociology‚ social classes describe one form of social stratification." Cheggs (n.d)[online]. “A large group of people whose economic circumstances‚ usually measured by their incomes‚ wealth and occupation‚ are broadly similar” Earlhamsociology pages (n.d) [online]. Social class can be said to be the level which an individual or a group of
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The Natural World Genesis 1-11 is filled with references to the natural world. The first two chapters are essentially all about the natural world because they are about the creation of it. The bible states that God created the world in 6 literal days by speaking it into being. He created the stars‚ moon‚ and son. The earth and sky‚ animals and vegetation‚ were all spoken into being and he created everything at a stage of maturity so they everything could reproduce. At the end of every day He proclaimed
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During the icy brutal seasons of the war‚ conditions inside the trenches became atrociously loathsome. Previously‚ before the war the front lines were beautiful and now the once picturesque landscape was tarnished with artillery shells‚ Scattered among the rotting carcass of their own fellow soldiers. During “The Battle of Somme”‚ in 1916‚ German soldiers was trained to spot how British officers dressed and was ordered to kill them. I also know from my own knowledge that before the battle had started
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