Statistics 1. A running coach is researching how the pace of runners changes during the course of a race. a. He takes a simple random sample of 20 athletes running an 800m race. The 800m race consists of two laps round a 400m track. What statistical test should he perform to determine whether there is a difference between population average completion times for the first lap and the last lap? b. He takes another simple random sample of 20 athletes running a 1200m race. The 1200m race consists
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DSM IV PSYCHOLOGICAL DISORDERS DSM IV is the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders. It is also known as DSM-IV-TR. It is a manual published by the American Psychiatric Association (APA) that includes all currently recognized mental health disorders. It is used in the United States and in varying countries around the world. It is used by clinicians‚ researchers‚ psychiatric drug regulation agencies‚ health insurance companies‚ phameceutical companies‚ and policy
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Multiple regressions were used to test H1‚ H2‚ H3‚ H4‚ H5‚ H6‚ and H7. Multiple regression is the most often used statistical tool for analyzing data in behavioral research (Pedhazur‚ 1997). More specifically it is often used when relationships between variables are examined. The dependent variable in the study is the unofficial TOEIC score‚ representing the English readiness
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Chapter 1 THE PROBLEM AND ITS BACKGROUND Introduction The Philippines is primarily an agricultural country. Most of the citizens that still live in rural areas support themselves through agriculture. One of the four sub-sectors of agriculture is farming. Farming is one of the common forms of livelihood in the county. The rate of the crops produced here in the country shrank as of 1999 according to the Encyclopedia of Nations. One of the main reasons is the industrialization of farms. The farmers
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Exercise 27 5. In the legend beneath Figure 2[->0]‚ the authors give an equation indicating that systolic blood pressure is SBP = 43.2 + 0.17x. If the value of x is postnatal age of 30 hours‚ what is the value for Ŷ or SBP for neonates ≤1‚000 grams? Show your calculations. Y = a + bx 43.2 + 0.17(30) = 48.3 The SBP for neonates ≤1‚000 grams at 30 hours is 48.3. 6. In the legend beneath Figure 2[->1]‚ the authors give an equation indicating that systolic blood pressure is SBP = 50.3 + 0.12x
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general increase in the sales of ice cream based on increasing income during the past 4 decades. The alternative hypothesis was that a larger household income would not increase the sales of ice cream. Rejection Criteria The criteria for statistical significance was set at 1% and P was set at 0.1 for the demographic analysis that showed purchasing likelihood by demographic. Results The study concluded that there was a general increase in the purchasing of ice cream as income increased‚ however
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predictors are proven to predict a future employee’s promotion potential. However‚ only work experience can also predict performance‚ the rest of the selection tools do not statistically predict citizenship‚ absence or performance. The worst statistical predictor of performance‚ in the traditional method‚ has proven to be the interview score with a high p-value and a very low correlation. Tanglewood would like to more accurately predict the characteristic of future employees who will excel in
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etc.) what three populations are being compared using one-way ANOVA? (1 pt.) b) What multiple comparison procedure did they use for making pairwise comparisons and how did they denote which means were significantly different? (2 pts.) c) What statistical technique did they use to compare gestational diabetics (GDM) to healthy women (Control)? (1 pt.) d) For which responses and at which sites were significant differences between gestational diabetics and healthy controls found? (2 pts.) e)
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Psych Stats Exam 4 Study Guide 1) One way ANOVA is the appropriate statistical test when there is one nominal independent variable with at least 3 levels; one sacle DV‚ and either between groups or within groups design 2) One way ANOVA Null Hypothesis: No differences between population means. µ1=µ2=µ3 Alternative Hypothesis: At least one pop mean is different from at least one other pop mean. (Can’t use symbols) 3) Numerator of the F statistic measures between groups variance (MSbetween)
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RESEARCH PROBLEM: A problem is (1) any significant‚ perplexing and challenging situation‚ real or artificial‚ the solution of which requires reflective thinking; (2) a perplexing situation after it has been translated into a question or series of questions that help determine the direction of subsequent inquiry. ELEMENTS OF A RESEARCH PROBLEM The term research problem implies that an investigation‚ inquiry or study is to be conducted‚ or that the problem is ready for investigation
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