# Textbook Notes for EC255 at Wilfrid Laurier University (WLU)

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## EC255 Chapter Notes - Chapter 9: Null Hypothesis, Type I And Type Ii Errors, Statistical Hypothesis Testing

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Ec255 chapter 9 textbook: statistical inference: hypothesis test. Business researchers are often called upon to provide insights and information to dec

View Document## EC255 Chapter Notes - Chapter 1: Statistical Inference, Descriptive Statistics

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Business researchers conducting a study and providing rich and interesting information that can be used in business decision making. Statistics: a scie

View Document## EC255 Chapter Notes - Chapter 7: Selection Bias, Central Limit Theorem, Statistical Parameter

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Ec255 chapter 7 textbook: sampling and sampling distributions. Means of gathering useful information about a population. Data gathered from samples and

View Document## EC255 Chapter Notes - Chapter 4: Weighted Arithmetic Mean, Noise Reduction, Bayes Estimator

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Much statistical analysis is inferential, and probability is the basis for inferential statistics. Inferential statistics involves taking a sample from

View Document## EC255 Chapter Notes - Chapter 2: Abscissa And Ordinate, List Of Statistical Packages, Ogive

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Frequency distributions: a summary of data presented in the form of class intervals and frequencies. Range: the difference between the largest and smal

View Document## EC255 Chapter Notes - Chapter 16: Level Of Measurement, Contingency Table, Null Hypothesis

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Ec255 chapter 16 textbook: analysis of categorical data. Binomial distribution: only 2 possible outcomes could occur on a single trial in an experiment

View Document## EC255 Chapter Notes - Chapter 3: Skewness, Bias Of An Estimator, Standard Score

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Measure of central tendency: yield information about the centre, or middle part, of a group of numbers. A table of price-to-earnings ratio: measures of

View Document## EC255 Chapter Notes - Chapter 12: Standard Streams, Null Hypothesis, Confidence Interval

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Ec255 chapter 12 textbook: correlation and simple regression analysis. Correlation: measure of the degree of relatedness of variables. E. g. can help r

View Document## EC255 Chapter Notes -Squared Deviations From The Mean, Standard Deviation, Kurtosis

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Virtually every area of business uses statistics in decision making, Statistics a science dealing with the collection, analysis, interpretation, and pr

View Document## EC255 Chapter Notes - Chapter 11: F-Distribution, Type I And Type Ii Errors, Null Hypothesis

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Ec255 chapter 11 textbook: analysis of variance and design. Experimental design: a plan and a structure to test hypotheses in which researcher either c

View Document## EC255 Chapter Notes - Chapter 8: Unimodality, Confidence Interval, Central Limit Theorem

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Ec255 chapter 8 textbook: statistical inference: estimation for single populations. 8. 1 estimating the population mean using the z statistic ( Take ra

View Document## EC255 Chapter Notes - Chapter 6: Probability Distribution, Poisson Distribution, Exponential Distribution

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Ec255 chapters 5 & 6: uniform, poisson, and exponential distributions. A discrete random variable assumes countable number of values. The probability o

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