For the following pairs of assertions, indicate which do not comply with our rules for setting up hypotheses and why (the subscripts 1 and 2 differentiate between quantities for two different populations or samples):
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For the following pairs of assertions, indicate which do not comply with our rules for setting up hypotheses and why (the subscripts 1 and 2 differentiate between quantities for two different populations or samples):
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- 2. Use the given information to find the following a. Provide the t-score required for this hypothesis test. (Include at least two decimal places) b. What is the p-value determined by this hypothesis test?1. For a and b, conduct every step of the Hypothesis testing process (1-5). The distribution of SAT scores is normal with M = 500, with a standard deviation alpha = 100. Mable believes that she scored significantly higher than average, at x = 643. Did Mable scores significantly higher than the average SAT score? A sample of n = 30 adults is taken from the above population and their average SAT score is measured to be M = 507. Does this sample differ from the population?For each of the following, complete the steps listed below. Identify and write each step with the appropriate corresponding number. 1. Write the claim and the null and the alternate hypotheses with proper notation. 2. Identify the level of significance. 3. Draw a distribution to represent it and identify the critical value. 4. Write the inequality that identifies the rejection area(s). 5. USE YOUR CALCULATOR to find the t-test statistic and the p-value. 6. Make a decision about your test. 7. Write a sentence describing your decision about the claim.
- For each problem, 1. Check the assumptions 2. State your hypothesis using appropriate notations 3. Compute the test statistic and p-value using R and Excel 4. Paste R Code and Excel Data Analytic ToolPak Output 5. Report significance level test statistics p-value If you reject or fail to reject the null hypothesis 6. Interpret your conclusion in the context of the application Problem 1: Early-Onset Dementia. Dementia is the loss of the intellectual and social abilities severe enough to interfere with judgment, behavior, and daily functioning. Alzheimer's disease is the most common type of dementia. In the article "Living with Early-Onset Dementia: Exploring the Experience and Developing Evidence-Based Guidelines for Practice" (Alzheimer's Care Quarterly, Vol. 5, Issue 2, pp.111-122), P. Harris and J. Keady explored the experience and struggles of peoples diagnosed with dementia and their families. A simple random sample of 21 people with early-onset dementia gave the following normally…For 7-8: Assume that all necessary conditions are met for the hypothesis tests we have studied. a. Formulate the null and alternative hypotheses using mathematical symbols. b. Explain which type of test should be used and why. c. Decide between one-tailed or two-tailed test and sketch an appropriate distribution curve with the appropriate critical value(s) shown on the horizontal axis. d. Calculate relevant sample statistics and the appropriate test value, all to four decimal places. e. Compute the p-value using a cdf in your calculator (write which calculator menu item was used), and shade in the corresponding area on your sketch. f. Verify all results using the Stat -> TESTS Menu in the calculator (write which menu item was used). Write the test value and p-value given by the calculator without rounding at all. g. Decide whether to reject the null or not reject the null, and explain why using both the traditional method and p-value method. h. Rephrase your final decision as a…Which of the following statements is NOT correct about the hypothesis test of comparing two correlation coefficients? O a. As the sample size increases, the critical value for the z-test will become smaller in absolute value O b. Table D (transformation of r to z) shows that when r is smaller, the corresponding z is very close to r O c. For the computation, the two correlation coefficients should be converted into z-scores first O d. Because r distribution is severely skewed, we can't directly use r for the hypothesis test
- In their advertisements, a new diet program would like to claim that their methods result in a mean weight loss of more than ten pounds in two weeks. In order to determine if this is a valid claim, they hire an independent testing agency that then selects twenty-five people to be placed on this diet. Which of the following is the correct hypotheses? a Ho: μ- 10 Ha: μ > 10 Ho: u > 10 Ha: u = 10 Ho: U = 10 Ha: u < 10 O d Ho: p = 10 Ha: u+ 10I need help with stats, section 7.2 and 7.3, please help with TI-84 calculator commands Test the claim about the population mean, μ, at the given level of significance using the given sample statistics. Claim: μ=40; α=0.01; σ=3.17. Sample statistics: x=38.1, n=72 Identify the null and alternative hypotheses. Write out the correct null and alternative hypotheses. Calculate the standardized test statistic: The standardized test statistic is ________________ (round to 2 decimal places as needed) Determin the critical value(s). Select the correct choice below and fill in the answer box to complete your choice. (round to 2 decimal places as needed) a. the critical value is ______________ b. the critical values are + _ ___________ Determine the outcome and conclusion of the test. Choose the correct answer below. A. fail to reject Ho. AT the 1% significane level, there is not enough evidence to reject the claim. B. fail to reject Ho. At the 1% significance…Consider the following hypotheses: He: p≥ 0.35 HA: P<0.35 Which of the following sample information enables us to reject the null hypothesis at a = 0.05 and at a = 0.10? (You may find it useful to reference the appropriate table: z table or ttable) (Round all intermediate calculations to at least 4 decimal places.) a. x = 30; n = 130 b. x = 85; n = 327 c. p= 0.33; n = 64 d. p = 0.33; n = 448 a = 0.05 a = 0.1
- For each of the following, complete the steps listed below. Identify and write each step with the appropriate corresponding number. 1. Write the claim and the null and the alternate hypotheses with proper notation. 2. Identify the level of significance. 3. Draw a distribution to represent it and identify the critical value. 4. Write the inequality that identifies the rejection area(s). 5. USE YOUR CALCULATOR to find the t-test statistic and the p-value. 6. Make a decision about your test. 7. Write a sentence describing your decision about the claim.For the following conclusions of hypotheses tests, write down if it is a Type I or Type II error, if any error was committed. Use a = 0.05 for all parts. For a one-sample t-test testing Ho: μ ≥ 5.5 vs. HẠ : µ 2, the p-value was 0.28, #1 was found to be 24, and 2 was found to be 18. a.Questions 6–10 refer to the sample data in the following table, which describes the fate of the passengers and crew aboard the Titanic when it sank on April 15, 1912. Assume that the data are a sample from a large population and we want to use a 0.05 significance level to test the claim that surviving is independent of whether the person is a man, woman, boy, or girl. Identify the null and alternative hypotheses corresponding to the stated claim.