Introduction Learning goals ❖ What is meant by Statistics ❖ What is meant by Descriptive Statistics and Inferential Statistics ❖ Difference between Parameter & Statistic ❖ Types of Statistical Inferences What is meant by Statistics ? Statistics is the science of collecting‚ organizing‚ presenting‚ analyzing‚ and interpreting numerical data to assist in making more effective decisions. Types of Statistics Descriptive Statistics : • Methods of organizing‚ summarizing‚ and presenting
Free Sampling Sample size Sample
UNIVERSITY OF TORONTO Joseph L. Rotman School of Management RSM332 PROBLEM SET #2 SOLUTIONS 1. (a) Expected returns are: E[RA ] = 0.3 × 0.07 + 0.4 × 0.06 + 0.3 × (−0.08) = 0.021 = 2.1%‚ E[RB ] = 0.3 × 0.14 + 0.4 × (−0.04) + 0.3 × 0.08 = 0.05 = 5%. Variances are: 2 σA = 0.3 × (0.07)2 + 0.4 × (0.06)2 + 0.3 × (0.08)2 − (0.021)2 = 0.004389‚ 2 σB = 0.3 × (0.14)2 + 0.4 × (0.04)2 + 0.3 × (0.08)2 − (0.05)2 = 0.00594. Standard deviations are: √ 0.004389 = 6.625%‚ σA = √ 0.00594 =
Premium Interest Variance Standard deviation
Descriptive Statistics Kelly Calle QNT/561 February 15‚ 2015 John Carroll Descriptive Statistics and Interpretation Descriptive statistics is the term given to the analysis of data that helps describe‚ show‚ or summarize data in a meaningful way. Descriptive statistics does not allow conclusions beyond the data analyzed or reach conclusions regarding any hypotheses made. It is only a way to describe the data gathered. Descriptive statistics allows data to be presented in a more meaningful way
Premium Standard deviation Normal distribution Statistics
listed above comprise a valid probability distribution? Explain. The individual probabilities are all between 0 & 1 and the sum = 100% b. What is the probability that a randomly selected request is for one of the three B’s? P(one of the B’s) = P(Bach) + P(Beethoven) + P(Brahms) = 5 + 26 + 9 = 40% c. What is the probability that a randomly selected request is for a Mozart piece? P(Mozart) = 21% d. What is the probability that a randomly selected request
Premium Standard deviation Arithmetic mean Normal distribution
1. Introduction This report is about the case study of PAR‚ INC. From the following book: Statistics for Business an Economics‚ 8th edition by D.R. Anderson‚ D.J. Sweeney and Th.A. Williams‚ publisher: Dave Shaut. The case is described at page 416‚ chapter 10. 2. Problem statement Par‚ Inc. has produced a new type of golf ball. The company wants to know if this new type of golf ball is comparable to the old ones. Therefore they did a test‚ which consists out of 40 trials with the current
Premium Statistics Confidence interval Statistical hypothesis testing
Concept and basics of probability sampling methods One of the most important issues in researches is selecting an appropriate sample. Among sampling methods‚ probability sample are of much importance since most statistical tests fit on to this type of sampling method. Representativeness and generalize-ability will be achieved well with probable samples from a population‚ although the matter of low feasibility of a probable sampling method or high cost‚ don’t allow us to use it and shift us to the
Premium Sampling Sample Randomness
available in the market easily. | | Question 2: Though normal distribution model is not an absolutely apt for the data set of prices‚ the data can still be analyzed by assuming normality owing to the fact that data points hover around the diagonal line of normal Quantile plot. Some data points also cross the permissible range‚ but the density of data (high in the middle‚ and low at the ends ) allows for the usage of normal distribution model.The same can be verified from the measure of Kurtosis (0
Free Median Standard deviation
summaries: sleep “mening over prijs’ in variable; ok gemakkelijk om betekenis van variabele te gaan weergeven Crtl A : alles toevoegen. * Frequentietabel maken: analyze; descriptive statistics; frequencies * Median berekenen van mening over prijs: terug naar frequencies en display uitschakelen; statistics klikken en median aanklikken * Met tabel: charts aanklikken… * Beoordelingscijfer: er zit een fout in‚ nul = geen mening tonen aan SPSS dat dit een ontbrekende waarde
Premium
Distribution decisions Lesson 3 Objectives • Explain why companies use marketing channels and discuss the functions these channels perform. • Discuss how channel members interact and how they organize to perform the work of the channel. • • Identify the major channel alternatives open to a company. • Discuss the nature and importance of marketing logistics and integrated supply chain management. • Discuss the future of retailing Explain how companies select‚ motivate‚ and evaluate channel
Premium Supply chain management Logistics Supply chain
Chapter 2 Charts and Graphs Statistics is the science of data. A first step in the study of statistics is the examination of data. Chapters 2 and 3 present several techniques for reducing data so that it is more manageable. In addition‚ graphic displays are essential to understand and interpret complex sets of data in order to be able to make business decisions easier. Chapter 2 discusses and displays several graphical tools including the histogram‚ frequency polygon‚ ogive‚ dot plot‚ bar
Premium Bar chart Chart Pie chart