Level of Significance (alpha) 0.010 0.010 0.010 0.010 Critical Value (lower tail) -2.576 -2.576 -2.576 -2.576 Critical Value (upper tail) 2.576 2.576 2.576 2.576 Hypothesized value 12 12 12 12 Standard Error 0.040 0.040 0.038 0.038 Test Statistic -1.027 0.713 -2.935 2.161 p-value 0.304 0.476 0.003 0.031 Only sample 3 leads to the rejection of the hypothesis H0: µ = 12. Thus‚ corrective action is warranted for sample 3. The other samples indicate H0 cannot be rejected and thus from all
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Research‚ Statistics‚ and Psychology PSY 315 Amber Lupo November 8‚ 2010 Amber Nelson “The definition of scientific method is a method of research in which a hypothesis is tested by means of a carefully documented control experiment that can be repeated by any other researcher” (yourdictionary.com‚ 2010.) “Research is the scholarly or scientific investigation or inquiry” (American Heritage Dictionary‚ 2000.) Primary and secondary data are dependent to each other‚ but also completely
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Population variance = σ2 = Σ ( Xi - μ )2 / N * Variance of population proportion = σP2 = PQ / n * Standardized score = Z = (X - μ) / σ * Population correlation coefficient = ρ = [ 1 / N ] * Σ { [ (Xi - μX) / σx ] * [ (Yi - μY) / σy ] } Statistics Unless otherwise noted‚ these formulas assume simple random sampling. * Sample mean = x = ( Σ xi ) / n * Sample standard deviation = s = sqrt [ Σ ( xi - x )2 / ( n - 1 ) ] * Sample variance = s2 = Σ ( xi - x )2 / ( n - 1 ) * Variance
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were randomly and independently chosen from the populations‚ population distributions are normal for each group; and population variances are equal for all groups. The assumptions of ANOVA are identical to the t-test and the calculated statistic is called an F-value which has a probability value associated with it. As with the t-test‚ if our probability value is less than 0.05 we reject our null hypothesis (in this case that there is no difference among the treatment groups). This p-value
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independent observations by the number of observations in the group that represent one of two outcomes. For example‚ the proportion of individuals in a random sample who support one of two political candidates fits this description. In this case‚ the statistic is thecount X of voters who support the candidate divided by the total number of individuals in the group n. This provides an estimate of the parameter p‚ the proportion of individuals who support the candidate in the entire population. The binomial
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Elementary Statistics Chapter 1 Test - Form A Name:___________________________ Course Number: __________ Section Number: _____ SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Provide an appropriate response. 1) Define the terms population‚ sample‚ parameter and statistic. How does a census compare to a sample? MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Identify the number as either
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Certain crimes are more prevalent than others‚ depending on the area. Many factors such as the population‚ ethnicity‚ and inequality between a group of individuals may contribute to the conflict perspective on crime rates. Crime rate can either increase or decrease on the scale. Therefore‚ even the number of crimes which are reported by the media‚ do not show competency and thus deemed inaccurate. According to Highfield (2014) "Those numbers‚ however‚ are not entirely accurate" (par. 2).
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Shenise Peterson Statistics Research Paper A. Nikzad March 20‚ 2012 Leonard Euler was born on April 15‚ 1707 in Basil‚ Switzerland (Patterson‚ 1998). He was brought up in the church (Patterson‚ 1998). His father Paul Euler was pastor of a reformed church as well as his mother’s father (Wikipedia‚ 2012). At that time‚ Basel was one of the main locations where mathematics was practiced in Europe (Patterson‚ 1998). Euler started school when he was 7 years old and was tutored by Johann Bernoulli‚ Europe’s
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STATISTICS PROJECT The balance is a interval‚ numerical and continuous variable. The ATM is a ratio‚ numerical‚ discrete variable. Services is a ratio‚ numerical‚ discrete variable. Debit‚ interest and city are a categorical‚ nominal variable. As the graph‚ shows below‚ the balance of the typical customer‚ otherwise known as the mean is equal to 1499.87. 12 customers have more than $2‚000 in their account. This number is relatively high because the account balances tend to cluster
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Business Statistics II: Research Paper Robert Franjieh April 19‚ 2015 Introduction This research paper will be designed to answer a couple questions regarding statistics about the Buena School District school bus data. The questions I will be discussing and answering will be based on maintenance of the school busses. The question prepared is; is it cheaper or more expensive to run Thompson‚ Bluebird‚ or Keiser busses? I will also be addressing another question
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