Under what circumstances are post tests necessary?When you fail to reject the null hypothesis with more than 2 treatment conditionsWhen you fail to reject the null hypothesis with exactly 2 treatment conditionsWhen you reject the null hypothesis with more than 2 treatment conditionsWhen you reject the null hypothesis with exactly 2 treatment conditions0000

When you reject the null hypothesis with more than 2 treatment conditions then Post tests are…

Answered: Under what circumstances are post tests…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Imagine you are doing a Related-Samples t-test, and you are on Step Two of the hypothesis test. The sample of difference scores that you calculated is -1, -1, -3, +2, 0, -4. If you are doing the test with α = .01, and two tails, what would he correct t-critical be?
You recently completed an experiment concerning the effects of carbs on happiness. One group of 11 people are assigned a high carb diet, another group of 11 people are assigned a moderate-high carb diet, another group of 11 people are assigned a moderate-low carb diet, and a final group of 11 people are assigned a low carb diet. If I find that I fail to reject the null hypothesis, what might my next step be? Group of answer choices Change my analysis and alpha to make the finding significant and then run post-hoc tests. 1. Run multiple dependent measures t-tests to see if there are any significant differences between particular groups 2. Run multiple independent samples t-tests to see if there are any significant differences between particular groups 3. Change my hypothesis to see if I can find something significant with a different hypothesis for this study 4. Run home and binge-watch Bridgerton because there is nothing else that should be done statistically
An opinion poll was conducted to examine people's satisfaction with the work of civil defense during the coronavirus epidemic. 200 people were asked and 180 of them said they were satisfied with the work of the civil defense. The polling company also conducted a hypothesis test with the hypotheses below and found that the value of the test size was 1.88. H0 : p = 0,85 H1 : p ≠ 0,85 What is the p-value of the hypothesis test?
Suppose we want to test the null hypothesis H0 : p1 − p2 = 0.2 against the alternative hypothesis Ha : p1 − p2 < 0.2 at the 5% level of significance. Suppose also that x1 = 80, n1 = 100, x2 = 40, n2 = 80. What is the observed test statistic for this test?
A hypothesis was tested twice using a two - tailed z- test. The first test was done with a 5% significance level while the second test using a 10% significance level. If the test stastic for both tests is - 1.75, which of the following is true? A At 5% and 10% alpha level, the null hypothesis is accepted B The null hypothesis is rejected at 5% and accepted at 10% C The null hypothesis rejected for both tests At 5% the null hypothesis is accepted and rejected at 10%
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Suppose there is a claim that a certain population has a mean, u, that is 6 or more. You want to test this claim. To do so, you collect a large random sample from the population and perform a hypothesis test at the 0.10 level of significance. To start this test, you write the null hypothesis Ho and the alternative hypothesis H, as follows. Ho u26 Hi u<6 Suppose you also know the following information. The critical value is -1.282 (rounded to 3 decimal places). The value of the test statistic is -2.405 (rounded to 3 decimal places). (a) Complete the steps below to show the rejection region(s) and the value of the test statistic for this test. o One-tailed o Two-tailed Step 2: Enter the critical value(s). (Round to 3 decimal places.) 0.3 0.2 0. Step 3: Enter the test statistic. (Round to 3 decimal places.) (b) Based on your answer to part (a), choose the correct statement. o The value of the test statistic lies in the rejection region. The value of the test statistic doesn't lie in the…
Does training in stress reduction make a difference for student success? 15 students received training (M1= 88, SS1= 400) and 15 students did not (M2= 82, SS2= 440). Test using α = .05 Which is the null hypothesis, H0?
You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is significantly smaller than 58% at a level of significance of αα = 0.01. According to your sample, 43 out of 85 potential voters prefer the Democratic candidate. For this study, we should use The null and alternative hypotheses would be: Ho: (please enter a decimal) H1: (Please enter a decimal) The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is αα Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest the population proportion is not significantly smaller than 58% at αα = 0.01, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is equal to 58%. The data suggest the populaton proportion is significantly smaller than 58% at αα = 0.01, so there is…
1. For the given the following x and y data: X 4 5.4 5 5.7 6.1 6.4 7 6.7 8 6.8 9 7.1 10 7.5 11 7.8 12 8.5 13 12.7 14 8.8 Construct scatterplot using Ti-83/84 PLUS just like I have shown in the lecture. b) a) State null and alternative hypotheses. Find the value of the linear c) correlation coefficient, using Ti-83/84 PLUS or formula provided. r, d) Determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables. Identify in the feature of the data (outlier) that would be missed if parts c) & d) were completed constructing the scatter plot. without
Suppose you have a sample where 201 out of 400 people support a new law. Test the claim that more than 50% of people support the new law, You can use the following diagram to check whether or not the Pvalue is less than 5% 0.95 0.05 1.645 Note that you have to do all the steps of Hypothesis testing, State the null and alternative hypothesis and decide whether or not to reject H0 etc
Suppose I conduct a study and, after analyzing the data, I end up sticking with the null hypothesis. Also suppose that, in truth, the research hypothesis is correct. In that case I've made what kind of error? O Type I (alpha) O Type Il (beta) O Type II (eta) A false alarm Both Type I and Type II

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