Student's t-distribution

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    Exam Performance Analysis

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    t-test of Male and Female Exam Results Equal variances were assumed as male and female variances are similar. The null hypothesis, that the difference between male and female results was 0, was not rejected (0.50 is greater than 0.05 at 5% significance) for the alternative hypothesis, that the difference between male and female results would be greater than 0. Therefore, there is insufficient evidence that males outperform females on exams. The effect of lecture attendance on exam results was also examined using a two-sample t-test. Table 5. t-test of Exam Results with High and Low Lecture Attendance At 5% significance, the highlighted one-tail p-value of 0.002 is smaller than 0.05. Hence, the null hypothesis that those who have high lecture attendance achieve the same exam results as those who do not is rejected for the alternative hypothesis that high lecture attendance increases exam results. Hence, using this t-test, there is sufficient evidence that higher lecture attendance increases exam score. Model 4.1 Interpretation The regression output in table 3 can be expressed as an equation to model exam results. y_(exam result)=2.39267+1.48505〖 x〗_1+0.98494 x_2+2.81056 x_3+0.54784〖 x〗_4…

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    The article, “The Digit Span Backwards Task: Verbal and Visual Cognitive Strategies in Working Memory Assessment”, by Hilbert, Sven, Tristan T. Nakagawa, Patricia Puci, Alexandra Zech, and Markus Buhner, aims at investigating the differences in performance between visualizers and verbalizers cognitive strategies by using digit span backwards. The digit span backwards has been used for many decades to assess the working memory capacity. The concept of working memory initiates the way we are able…

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    notable point is that the above solutions depend only on bend factor(h), not on r/t and R/r. Equations (1-3) are applicable only for the pure in-plane bending moment and the effect of internal pressure is not taken in to account. Also these analytical solutions consider constant wall thickness along the contour of the pipe bend cross section. However, the most of the pipe bends are made using a forming process and as a result, have wall thickness variation along the surfaces of the pipe bend…

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    be more patriotic than other ethnicities, and participants whose parents achieved a higher level of education will be more patriotic. Furthermore, I hypothesize that White males will have higher levels of patriotism than non-White females. Method Participants Participants were recruited over Facebook to fill out my survey. My survey was designed with 11 close-ended questions (8 patriotism questions, 3 demographic questions). Demographics were taken on sex, ethnicity, and highest level of…

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    Sample Research Questions

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    The descriptive analyses include different statistical methods, such as, Chi-Square, independent sample T-Test, Bivariate correlation, and Binary regression. The survey focuses primarily on the students’ spending, such as acquiring textbooks, living on campus vs. off campus, enrolling in the university’s meal plan, transportation costs, as well as any other costs that are important for the students’ needs and success during college. Since the respondents all come from different backgrounds,…

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    stronger internal reliability of .69 if item regarding academic concerns was excluded from the questionnaire. Furthermore, items associated with coping strategies reported consistent correlations throughout questionnaire with problem-focused strategies ranging from .78 to .65 and emotion-focused strategies ranging from .61 to .42. Hypothesis #1 examined the overall perceived stress levels between males and females. An independent sample t-test reported female undergraduate psychology…

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    Practicum Questions

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    14(2) .http://dx.doi.org/10.1177/1474704916653964 Question 2: Describe the results of the practicum (2 marks) and critically discuss the results of the practicum in the context of previous evidence (2 marks). You should include at least 2 references (1 mark). Answer (max 250words): An independent sample t-test was conducted to compare evaluation in the neutral and deceiving conditions, t (117) = -.311, p= .779. An independent sample t-test was conducted to compare pain intensity in the neutral…

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    inoculated on a 1 μM phosphate agar plate (Biology 108 Lab Manual 2015). There were 6 agar plates (Class groups) within each treatment group. Using sterile technique with a pasteur pipette, 1 seed per agar plate grid-line was inoculated for a total of 7 seeds per treatment. The agar plates were sealed, labeled, and incubated at room temperature for 2 weeks. Then, germination frequency and the quality of seedling development was determined in both groups. To control for possible growth…

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    There are different types of parametric tests to determine if a statistically significant difference is present. An independent-samples t-test is used when comparing two groups on one continuous dependent variable that is normally distributed. A paired-samples t-test is used when you look at the differences of one group across two time periods or observation periods. ANOVA tests are used when we are examining more than two groups or more than two observation periods. Slide 3: Our null…

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    fluctuate across time. 3. Standard error represents the statistical accuracy of an estimate through the standard deviation of the sampling distribution of a given population. Most commonly measured through the sample mean, the sample mean is an estimator of the population mean. The standard error of the mean is the standard deviation of the sample means over all possible samples drawn from the population and is useful for estimating a populations size. A confidence interval represents a range…

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