896. At the 0.05 significance level, the company assumes that urban area is higher than rural area. Formulating a Verbal and Numeric Hypothesis To formulate a verbal and numerical hypothesis statement one must determine which type of two-sample statistic test the problem describes. The statement indicates that one would perform a right-tailed test. The words “is higher than” indicates that the alternate hypothesis will have the greater than sign in it. The statement also indicates that the standard
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Simulation with Arena Assignment G2: a multi-echelon inventory policy Christopoulou Evdoxia Kuodzevicius Bernardas 101283 534893 10/12/2012 Preliminaries The given Arena model is a steady-state model, because there is no clear event that could indicate the end of model run and actually we are interested in the long run behavior of the system represented by the given model. Before we start to do the main parts of the assignment, that is design of experiments and optimization, we conduct some preliminary
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Week 7 Homework 24. H0: μ2 ≤ μ1 H1: μ2 > μ1 a = 0.05 (one-tailed) z-crit = 1.645 test statistic z = (μ2-μ1) / √[(s1)²/n + (s2)²/m] = (351-345) / √[28²/60 + 21²/54] = 1.3 Failed reject H0 because 1.3 < 1.645 and conclude that the difference in means is not significant because the number of units produced on the afternoon shift is larger. 34. These are independent samples of sufficient size to use the z-test for proportions. n1 = 270 x1 = 56 n2 = 203 x2 = 52 α = 0.05
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The terms "statistical analysis" and "data analysis" can be said to mean the same thing -- the study of how we describe, combine, and make inferences based on numbers. A lot of people are scared of numbers (quantiphobia), but data analysis with statistics has got less to do with numbers, and more to do with rules for arranging them. It even lets you create some of those rules yourself, so instead of looking at it like a lot of memorization, it's best to see it as an extension of the research mentality
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Descriptive Statistics Paper Research and Evaluation I RES/341 July 20, 2011 Patricia Towne University of Phoenix Descriptive Statistics Paper Last week, team C paper included a hypothesis that explained why gas prices were on the rise and the factors that play a part it in. This week, after further research and evaluation team C conducted intense research to support and confirm the articles that explained the different situations that involved crude oil and the reason why it plays a factor
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#1a. Examination of four similar jurisdictions by population Law City Population= 36,328 (a1) (a2) City | Population | # of Officers | Appletown | 32,292 | 45 | Fun City | 45,005 | 39 | Home Wood | 44,134 | 54 | Lake Villa | 31,716 | 30 | Data Source Population of Law City from 1a Group F #1 Population and Officers From other cities Table 16 project Data set 3 #1b. Number of Officers per 1000 Data Source= Table 16 and Q1a City | Population/1000
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and G-20 countries die before the age of 60.. H0: µ = > .50 H1: µ NE > .50 alpha = .05 Step 3 The third step of hypothesis testing is to calculate a statistic analogous to the parameter indicated by the null hypothesis. Due to the sample size of 62 countries, the Z-test will be utilized to calculate the test statistic. The x bar is equal to the sample mean of 6.55 and the standard error of x bar is 1.83. Z= x bar - µ
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Quantitative Research Critique This is a critique on the article “Does Enteral Contrast Increase the Accuracy of Appendicitis Diagnosis?”, written by Latifi, A. et al in 2011. Appendicitis is the most common abdominal emergency and occurs most often between the ages of ten and twenty years old and more frequently in men (Rybkin, 2007). It was once thought that appendicitis was related to an obstruction of the appendix, therefore it was logical to use contrast enema and fluoroscopy to diagnose. Later
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Problem 1 Decision rule: Reject if tSTAT> 2.0096 d.f. = 49 Test statistic: Decision: Since tSTAT> 2.0096, reject . There is enough evidence to conclude that the mean number of days is different from 20. (b) The population distribution needs to be normal. (c) The boxplot plot indicates that the distribution is skewed to the right. (d) Even though the population distribution is probably not normally distributed, the result obtained in (a) should still be valid due
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d-hoc Statistics Report submitted to the CEO October 16, 2011 Table of Content Title Page ...............................................................................................................................................i Table of Contents ..................................................................................................................................iii Vacation Histogram .....................................................................................
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