How to Lie With Statistics

The Post – hoc analysis which is the cause and effect problem. Methods of presenting cause and effect: 1) present a result without a significance value 2) use untestable assumptions 3) use precision and accuracy interchangeably 4) perform nonsensical test that sound good. Keep in mind that a statistic is only worthwhile when it satisfies the assumptions on the test. Knowing whether the assumptions are met is dependent on the competence of the person running the test. Just because two things seem to have a relationship, could it have been by pure chance? It cannot be determined by causation and effect. The two variables have no effect on each other at all. Chapter 9 – How to Statisticulate Statisticulate is…

The big 5 personality traits

Introduction: 1. The aim of this study was to examine the relationship between the ‘Big Five’ personality traits (neuroticism, extraversion, conscientiousness, agreeableness and openness) and career success (Seibert & Kraimer,2001). A questionnaire was sent by post to 2781 graduates of business and engineering. 496 alumni took part in the survey (318 males and 178 females). The conclusions were that agreeableness is not well related to career success; there is no relationship between the other four factors and career success. High people orientated jobs showed a poor relationship between agreeableness and salary. Low people orientated jobs shows no relationship between agreeableness and salary. METHOD: 2. Career success can be defined as the positive psychological and work related outcomes as a final…

Topic or Unit of Study: Solving multi-step math problems

Grade/Level: 3 Instructional Setting: It is a third grade classroom of 20 students (8 girls and 12 boys) seated in 5 groups of 4. Most of the students are of Hispanic ethnicity, and the teacher can speak Spanish fluently and uses this skill when deemed necessary. Some students are also Caucasian, and there are a couple of African American and Asian students as well. STANDARDS AND OBJECTIVES Your State Core Curriculum/Student Achievement Standard(s): 1.3.8: Students will generate and solve two-step addition and subtraction problems and one-step multiplication problems based on practical situations. Model addition, subtraction, multiplication, and division in a variety of ways. Use mathematical vocabulary and symbols to describe multiplication and division. Lesson Goals: Students will learn how to…

Inventory management system

Introduction Technology is simultaneously advancing together with what internet offers. Many system made by programmers and companies are innovating people look and need them via internet. One click, thousands results, probably millions or ever billions of different system. One button press brings people to new discoveries and massive enjoyment. A sales and inventory system is a system that can handle a company data. With this system, company will not easily lost their record of items and record of their daily, monthly or yearly income. Some companies have not yet developed their system like this, they still in the handing out of records manually, then write it on in an inventory book. Yet the main problem with the manual inventory is…

Testing hypothesis

Introduction to Hypothesis Testing 8.1 Inferential Statistics and Hypothesis Testing LEARNING OBJECTIVES 8.2 Four Steps to Hypothesis Testing After reading this chapter, you should be able to: 8.3 Hypothesis Testing and Sampling Distributions 8.4 Making a Decision: Types of Error 8.5 Testing a Research Hypothesis: Examples Using the z Test 8.6 Research in Focus: Directional Versus Nondirectional Tests 8.7 Measuring the Size of an Effect: Cohen’s d 8.8 Effect Size, Power, and Sample Size 8.9 Additional Factors That Increase Power 1 Identify the four steps of hypothesis testing. 2 Define null hypothesis, alternative hypothesis, level of significance, test statistic, p value, and statistical significance. 3 Define Type I error and Type II error, and identify the type of error that…

The researchers were motivated to use the Luzon Brokerage Corporation

The researchers were motivated to use the Luzon Brokerage Corporation as the main subject of their research because of the issues they have heard from the past customers which are complaining about the service of the LBC. They wanted to help the LBC to know what are the lapses occur from their transaction and help them to know some of the applicable improvement of their services. As an entrepreneur they must develop their analytical thinking and situational problem solving. With the help of the LBC, it became the instrument for them to develop their ability, skills, self actualization and trust with the members of the group which became their companion, compadre, tropa, kaibigan, classmate, lover and a group-mates through-out the…

Directed Independent Adult Learning

Course Essentials Principles of Statistics (STA-201-GS) is designed to meet the needs of students in many disciplines and professions. The sciences, social sciences, and business are increasingly using quantitative methods. This course provides the tools and techniques needed to design studies that provide representative data for mathematical analysis and statistical interpretation. Topics include types of statistics, data representations (tables, graphs, and charts), measures of location and variation, probability concepts, continuous and discrete distributions, confidence intervals, hypothesis tests, and regression and correlation analysis. The emphasis of the course is on the application of statistical methods to real-world problems. In solving these problems, you are required to use the appropriate notation and formulas. Problems may be viewed as statistical studies, and as…

A statistician employed at the Guinness brewery

1.0 INTRODUCTION The t-test was developed by W. S. Gossett, a statistician employed at the Guinness brewery. However, because the brewery did not allow employees to publish their research, Gossett’s work on the t-test appears under the name “Student”. The t-test is sometimes referred to as “Student’s t-test.” Gossett was a chemist and was responsible for developing procedures for ensuring the similarity of batches of Guinness. The t-test was developed as a way of measuring how closely the yeast content of a particular batch of beer corresponded to the brewery’s standard. And the same statistical methodology that compares a particular batch of beer to a standard can be used to compare how different any two batches are from each other….

Math Practice Lab

Math Practice Lab Pre-Lab Questions: 1. The rules concerning handling significant figures are as follows: When dividing/multiplying The answer has no more significant digits than the number with the fewest significant digits (the least precise figure). Round off after calculations have been performed. When adding/subtracting Answer has no more places than the addend, minuend, or subtrahend with the fewest number of decimal places. Significant figures are irrelevant when adding/subtracting (least number of decimal places rule). 2. The concepts for using scientific notation is to allow the student a form to asses the order of magnitude and to visually decrease the zeros. It allows the student to compare very large or very small numbers and to better understand those numbers. Scientific…