CHAPTER 10: TWO-SAMPLE TESTS WITH NUMERICAL DATA 1. The t test for the difference between the means of 2 independent populations assumes that the respective a) sample sizes are equal. b) sample variances are equal. c) populations are approximately normal. d) all of the above ANSWER: c TYPE: MC DIFFICULTY: Moderate KEYWORDS: pooled-variance t test‚ assumption 2. The t test for the mean difference between 2 related populations
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Chapter-11 Testing of Hypothesis: (Non-parametric Tests) Chapter-11: Testing of Hypothesis - (Non-parametric Tests) 2 11.1. Chi - square ( χ )Test / Distribution 2 11.1.1. Meaning of Chi - square ( χ )Test 2 11.1.2. Characteristics of Chi - square ( χ )Test 2 11.2. Types of Chi - square ( χ )Test / Distribution 2 11.2.1. Chi - square ( χ )Test for Population Variance 2 11.2.2. Chi - square ( χ )Test for Goodness-of-Fit 2 11.2.3. Chi - square ( χ )Test or Independence
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Step 1: Step 2: The alternative hypothesis is which indicates a one tail test. The degrees of freedom (df) = n-2=12-2=10. The t value at the significance level of .05 and df of 8 and from appendix F is 1.812. The decision rule is to reject the null hypothesis because the test statistic is greater then 1.812. Step 3: According to Appendix F‚ we can assume that P 1.744)‚ there is insufficient evidence to reject the null hypothesis. P-value Approach: Since the P-value is less
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Chapter III RESULTS AND DISCUSSION This chapter presents the data obtained through the survey conducted‚ and the analysis of the data using the appropriate statistical treatment and the interpretation of the results obtained. Problem No. 1: What is the level of performance of third year students in? Table 3 Perception of Third Year High School Students on Disruptive Behaviour Gender Gender | Mean | Standard Deviation | Qualitative Description | Male | 3.21 | 0.58 | fair | Female | 2.94
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exchange rate stability produced an additional bias in the probability limit of the slope coefficient β in the UIP regression. Culver & Papell (1999) demonstrated statistically‚ using KPSS tests‚ that the combination of rejecting the stationary null hypothesis for nominal‚ but not for real‚ exchange rates constitutes evidence of long-run PPP. Finally‚ Engel (2000) argued that long-run PPP may not hold after all‚ since tests on long-run PPP tend to have serious size biases under many common statistical
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literature review search plan 2. Focusing on a research question Inductive/deductive 3. The research proposal Which type of research path? What do you examine? Variable (independent/dependent/intervening) What do you examine? Hypothesis‚ null hypothesis‚ alternative hypothesis What type of explanation? Causal explanation: you need a control experiment Avoid spuriousness How to look for patterns in the data Quantitative/qualitative data Chapter 4 How and why do samples work? Sample Population
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obtained your F2 generation information from your group to complete the questions on your lab handout. I will be grading all of the tables and questions in your lab. Being able to write a null hypothesis will be extremely important in college so make sure to take your time and do it right ( Remember that the null hypothesis needs to be in an “If…then…because” format. • Ex. If I cross ___________then a ratio of ________should be expected because _____________. Because the results of our lab were
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described by the range and the variance or standard deviation. The general procedure for hypothesis testing involves eight steps. Formulate the null and the alternative hypotheses‚ select an appropriate test statistic‚ choose the level of significance (α)‚ calculate the value of the test statistic‚ and determine the probability associated with the test statistic calculated from the sample data under the null hypothesis. Alternatively‚ determine the critical value associated with the test statistic. Compare
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Background One theory developed by psychologists working within the biological approach is the idea that males have better spatial ability than females. Spatial ability is the ability to mentally manipulate 2-dimensional and 3-dimensional figures. One way in which spatial ability can be operationalised is in the form of mental rotation test. A mental rotation test requires participants to identify rotated versions of a target stimulus. Mental rotation usually takes place in the right cerebral hemisphere
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likely to make ATM transaction because they can use their bank debit cards at stores to pay for their items without having to go directly to their bank to make the withdraw. The test is going to use a significant level of .01 for the test. The null hypothesis is that there are less ATM transactions necessary for debit card holders than by non debit card holders. ANOVA/Z TEST/F Distribution ATM Debit Mean Non-Debit Card Holders
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