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You can use a confidence interval (CI) for hypothesis testing. In the typical case, if the CI for an effect does not span 0 then you can reject the null hypothesis. But a CI can be used for more, whereas reporting whether it has been passed is the limit of the usefulness of a test.
The reason you're recommended to use CI instead of just a t-test, for example, is because then you can do more than just test hypotheses. You can make a statement about the range of effects you believe to be likely (the ones in the CI). You can't do that with just a t-test. You can also use it to make statements about the null, which you can't do with a t-test. If the t-test doesn't reject the null then you just say that you can't reject the null, which isn't saying much. But if you have a narrow confidence interval around the null then you can suggest that the null, or a value close to it, is likely the true value and suggest the effect of the treatment, or independent variable, is too small to be meaningful (or that your experiment doesn't have enough power and precision to detect an effect important to you because the CI includes both that effect and 0).
1. In your own words, what is the difference between a confidence interval and a hypothesis...
Part 1: Create your own Hypothesis Test and Confidence Interval from 1 sample Using methods from chapter 8, test ONE claim about a population parameter by collecting your own data or using our class survey data. Include your written claim, hypothesis in both symbolic and written form, relevant statistics (such as sample means, proportions etc.), test statistic, p-value (or critical value), conclusion, and interpretation of your conclusion in the context of your claim. Use a 0.05 significance level. You will...
10) (a) In a hypothesis testing procedure explain the difference between a type 1 and type 2 error (b) Explain the difference between a point estimate and an interval estimate? What is a confidence interval? (c) A poll service indicates that 74% of the public is opposed to a certain piece of legislation but there is a 95% margin of sampling error of 3.1%. Express these findings as a confidence interval. (d) You read in the paper that in a...
Appendix D: Estimation and Hypothesis Testing. 1. Briefly, in your own words, explain what it means for an estimator to be BLUE. 2. Briefly, in your own words, explain a type I error. 3. Briefly, in your own words, explain a type II error. 4. Use the table below to answer this question: what is the 90% confidence interval for the mean fx given a sample X with 24 degrees of freedom? (a) Beginning with the formula P(-terit < t-value...
Say a 95% confidence interval for P2 - P2, the difference between two proportions, is (0.152, 0.392). This indicates that the difference between the two proportions is not significant. A) True-- Yes OB) False--No O C) Can't tell without the data Question 7 (1 point) According to National Eye Institute (NEI), in 2010, 61% of Americans with cataract were women and 39% were men. Suppose you want to conduct a test for the difference in proportions to test whether females...
1. Explain in your own words the difference between capitalism and socialism. What are they both trying to achieve? In your answer, make sure you define both. 2. Explain a circumstance in business to which the problem of the commons/prisoner’s dilemma applies and why it applies to this circumstance.
Calculate the margin of error of a confidence interval for the difference between two population means using the given information. Round your answer to 3 decimal places. ?1 = 14.11, ?1 = 78, ?2 = 10.84, ?2 = 91, ? = 0.8
Explain, in your own words, what a confidence interval tells us about an estimate.
O CONFIDENCE INTERVALS AND HYPOTHESIS TESTING Confidence interval for the difference of population means: Use... A psychologist wants to test whether there is any difference in puzzle-solving abilities between boys and girls. Independent samples of 16 boys and 9 girls were chosen at random. The boys took a mean of 31 minutes to solve a certain puzzle with a standard deviation of 7 minutes. The girls took a mean of 40 minutes to solve the same puzzle with a standard...
Describe, in your own words the difference between a change in the quantity supplied, and a change in supply. Give examples of what may cause each of these.
In your own words, what is the difference between JOURNALIZING and POSTING?