PPT-The Normal Curve

Probability Distribution Imagine that you rolled a pair of dice What is the probability of 51 To answer such questions we need to compute the whole population for possible results of rolling two dices . http. ://www.youtube.com/watch?v=xDIyAOBa_yU. The Standard Normal Distribution. 1. Notice that the x axis is . standard scores. ,. also called . z scores. .. This means that the distribution has a . Explaining the Normal Distribution. Preliminaries: How to describe data. Discussion Question: How do we describe data in Statistics?. In this course, the way we describe data is by using the C.U.S.S. Method. We look at these characteristics:. Lecture 9. The Normal Curve. The Normal Curve. ‘Bell’ Shaped. Unimodal in center. Tails extend to infinity in either direction. The Ideal Normal Curve. Naturally Normal. IQ tests. Standardized tests. Click the mouse button or press the Space Bar to display the answers.. Statistics are from ______ and parameters are from ________. In a uniform distribution everything is ______ likely.. If a distribution is skewed right, which is greater, the mean or the median and why?. History. Abraham de . Moivre. (1733) – consultant to . gamblers. . Pronunciation. .. Pierre Simon . Laplace – mathematician, astronomer, philosopher, determinist.. Carl Friedrich . Gauss – mathematician and astronomer.. 2.1 Density Curves and the Normal Distribution. Differentiate . between a density curve and a . histogram. Understand . where mean and median lie on curves that are symmetric, skewed . right, and . skewed left. 2.1 Density Curves and the Normal Distributions. 2.2 Standard Normal Calculations. 2. Histogram for Strength of Yarn Bobbins. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. X. Bobbin #1: 17.15 g/tex. Ümit Çağrı. 17D20415855. Aralık 2014. SKEWNESS . ( ÇARPIKLIK). &. KURTOSIS (BASIKLIK). Normal probability curve. Carl. Gauss. . The normal probability distribution or the “normal curve” is often called the Gaussian distribution, . z. Scores. Chapter 6. The . Bell . Curve is Born (1769). A Modern Normal Curve. Development of a Normal Curve: Sample of 5. Development of a Normal Curve: Sample of 30. Development of a Normal Curve: Sample of 140. (b) Here is a curve showing the proportion of batting averages above 0.329. Since 0.329 is exactly two standard deviations above the mean, we know that about 95% of batting averages will be between 0.193 and 0.329. Since the curve is symmetric, half of the remaining 5%, or 2.5% should be above 0.329. What it is. History. Uses. 1. Normal Curve Characteristics. Inflection points (at and – 1 SD). Where slopes changes from down to out.. Axes . X –axis (abscissa) =Scores (as usual). Y –axis (ordinate) = . What it is. History. Uses. 1. Normal Curve Characteristics. Inflection points (at and – 1 SD). Where slopes changes from down to out.. Axes . X –axis (abscissa) =Scores (as usual). Y –axis (ordinate) = . Strength- duration(I /t) curve . It is the test of neuromuscular junction, and irritability of the muscle.. This diagnostic test is presented in I /t.. It is also known as excitability curve.. Excitability Curve is the graph that demonstrates the exact relationship between the strength and the duration of the stimulus.. The Normal Curve. Notation. σ. = Population SD. S = Sample SD. µ = Population Mean. x̄ = Sample Mean. The Normal Curve. An individual has a score of . 26. on a leadership test.. Is that person a particularly good leader?.