The t-test for dependent groups is a parametric analysis technique used to determine statistical differences between two related samples or groups. Groups are dependent or related because they were matched as part of the design to ensure similarities between the two groups and thus reduce the effect of extraneous variables. For example‚ two groups might be matched on gender so an equal number of males and females are in each group‚ thus reducing the extraneous effect of gender on the study results
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Tutorial Note 5 • Chapter 17 Hypothesis Testing • Chapter 18 Measures of Association Objective: Computer laboratory session (II) – Please refer to the Computer Lab Notes Discussion Question 1 H0 – Null Hypothesis: a statement you want to reject (E.g Average = 50) H1/HA – Alternative Hypothesis: a statement you want to prove (E.g Average is not 50) What is related/dependent sample? H0: Tutorial is NOT effective H1: Tutorial is effective |Respondent |Before
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Annamma Thomas Exercise 29 1. The groups were independent because the men and women participating in the experiment did not share any relationships and their quality of life tests were totally independent of one another. 2. The variable described by this number is mental health. Since the P value is .002 and the alpha is .05‚ the difference can cause the null hypothesis to be rejected. 3. The T-Value is significant because the P value is .049 which is the closest to the alpa which is .05
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men and women. 6. What is a Type I error? Is there a risk of a Type I error in this study? Provide a rationale for your answer. “A Type I error is defined as rejecting a true null hypothesis (not being a believer in the utility of testing point null hypotheses‚ what I really mean here is rejecting a null hypothesis that is so close to true that for practical purposes it is true)” (Wuensch‚ 1994). No there is not a type I error in this study. The two groups are significantly different.
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Iterative D. Uses multiple sources of evidence 2. Which of the following describes qualitative research? A. Concepts are in the form of distinct variables B. Concepts are in the form of themes‚ motifs‚ generalisations and taxonomies C. Tests hypothesis that the researcher begins with D. Data are in the form of numbers or precise measurements 3. Which of the following is NOT a qualitative sampling technique? A. Snowballing B. Convenience C. Theoretical D. Random 4. Which of the following
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Homework 3 Probability 1. As part of a Pick Your Prize promotion‚ a store invited customers to choose which of three prizes they’d like to win. They also kept track of respondents’ gender. The following contingency table shows the results: | MP3 Player | Camera | Bike | Total | Men | 62 | 117 | 60 | 239 | Woman | 101 | 130 | 30 | 261 | Total | 163 | 247 | 90 | 500 | What is the probability that: a. a randomly selected customer would pick the camera? 247/500= 0.494=
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therefore‚ it is relatively easy to see their heart under a microscope‚ which makes it easier to count the number of heartbeats‚ thus‚ making my results more accurate. Hypothesis- Their will be a positive correlation between the concentration of caffeine given to the Daphnia and its heart rate. My reason behind this hypothesis is based on the fact that caffeine affects the heart rate of humans‚ as it is a stimulant. From this‚ I can assume that it also affects the heart rate of Daphnia and
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The results of the statistical test did not support the hypothesis. The statistical test proves that the null hypothesis can be accepted regarding temperature impacting weight. However‚ we accept the hypothesis regarding conductivity. The test shows that the conductivity of a cell submerged in a solution can be altered with changes in temperature as the independent variable. However‚ the test shows that we accept the null hypothesis for weight change because weight is not impacted by temperature
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EXERCISE 29 Questions to be Graded 1. Were the groups in this study independent or dependent? Provide a rationale for your answer. The two groups were independent since they were formed based on gender with no intent to match subjects on any variable. The men and women selected didn’t share any relationship or live in the same location. 2. t = −3.15 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer
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CBSE CCE good or Bad‚ Hate it or Like it? Central Board of Secondary Education (CBSE) had introduced grading system and the board has started continuous and comprehensive evaluation (CCE) system from October‚ under which students would not only be graded in five subjects but they would also be assessed keeping their holistic development in mind. Many People are happy with the new CCE system‚ one mother says “The CCE has some good effects too. My son is an average student‚ but since the
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