Team A Week Four Reflection Through out the duration of this week there were several topics that members of this team found both struggling and straightforward. The discussions of topics lead team members to help one another understand the differences between the t-test and z-test. Additional topics in the discussions were how hypothesis testing is crucial to determining if the hypothesis is valid or false. One way to know if the hypothesis is valid is to determine the null hypothesis‚ which the
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What is central tendency? Explain three important measures of central tendency? • Measures of central tendency are scores that represent the center of the distribution. Three of the most common measures of central tendency are: – • Mean Median Mode – – The Mean The mean is the arithmetic average of the scores. – Mean is the average of the scores in a distribution _ X = _________ i N Σ Xi Mean Example Exam Scores 75 91 82 78 72 94 68 88
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Reflection QNT351 June 12‚ 2014 Reflection Over the last four weeks of being in the QNT/351 course our team has learned a lot about researching a hypothesis and understanding the mean. The hypothesis testing begins with the statement and the assumption that determines the population of the mean‚ (Lind‚ 2011‚ p.288.). There are five steps taken which include; state the hypothesis‚ select level of significance for it‚ identify the test statistics‚ formulate decision rule‚ and take a sample to
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Introduction to Statistics (Measures of Central Tendency) Central Tendency: In a representative sample‚ the value of a series of data have a tendency to cluster around a certain point usually at the center of the series is usually called central tendency and its numerical measures are called the measures of central tendency or measures of location. Different Measures of Central Tendency: The following are the important measures of central tendency which are generally used in business:
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QNT 351 Final Exam1) The main purpose of descriptive statistics is to2) The general process of gathering‚ organizing‚ summarizing‚ analyzing‚ and interpreting data is called3) The performance of personal and business investments is measured as a percentage‚ return on investment. What type of variable is return on investment 4) What type of variable is the number of robberies reported in your city5) What level of measurement is the number of auto accidents reported in a given month6) The names of
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copyright‚ trademark‚ or other intellectual property laws. I further agree that my name typed on the line below is intended to have‚ and shall have‚ the same validity as my handwritten signature. Introduction to Statistics QNT 351 March 22‚ 2013 Merry Gallo Introduction to Statistics Statistics is defined in Statistics for Business and Economics‚ as the science of data. Involves collecting‚ classifying‚ organizing‚ analyzing‚ and interpreting numerical information
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Data Collection QNT/351 Quantitative Analysis for Business Learning Team Assignment: Data Collection Purpose of Assignment The purpose of the Learning Team assignment is acquaint teams with the research study undertaken‚ purpose of the study‚ research question‚ and so on. The team assignment is to complete the first step in data analysis in the following form: 1. Describe the problem‚ purpose‚ research questions‚ and hypotheses 2. Evaluate of the instrument used for data collection
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L-3 HR Department Betters Their Workforce QNT/351 September 12‚ 2014 Instructor: David FrancomIntroduction L-3 communications is a great company to be involved in. As challenges arise‚ the HR department goes to work with statistical decision making in order to make the best decision possible. This paper is a reflection of how steps in the decisions making process are being used by L-3‚ and can be used by any company to come up with the right conclusions to help solve problems. L-3 is a leader
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Measures of Central Tendency Objectives of the chapter • To use summary statistics to describe collections of data • The main goal is to come up with the one single number that best describes a distribution of scores. • Lets us know if the distribution of scores tends to be composed of high scores or low scores. • To use the mean‚ median and mode to describe how data bunch up. The sales of 100 fast food shop is given below: Sales No. of (in 000s) Shops 700-799 4 800-899 7 900-999 8 1000-1099 10
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Measures of Central Tendency 1. What Do You Mean by Mean? a) The mean of the salaries is calculated by adding up each individual salary and dividing it by the seven employees. The mean of the seven salaries is $43‚814.29. The mean compares to the individual salaries because it shows the average of all the salaries together. The employees would use the average to negotiate with Dick for a higher salary‚ because by looking at the average you can see that Dick’s salary is an outlier compared to
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