Under the null hypothesis, the expected difference between the means in a paired Samples t-test is ______. 0 infinite theoretical 1
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Under the null hypothesis, the expected difference between the
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- I need help with this one, please. I need it to be step-by-step please for me to understand.123.6 O 27.6 QUESTION 5 A random sample of size n= 25 is drawn from a normal population with a variance of 16, what is the maximum error that might occur when we use the sample mean to estimate the population mean with probability 0.99? O 7.443 1.861 O 2.061 O 8.243 QUESTION 6 Click Save and Submit to save and submit. Click Save All Answers to save all ansuers. Save All Answers DEV7
- Test the claim about the differences between two population variances a and o at the given level of significance a using the given sample statistics. Assume that the sample statistics are from independent samples that are randomly selected and each population has a normal distribution. Claim: o so, a = 0.05 Sample statistics: s, = 705, n, =3, s = 368, n, = 9 Find the null and alternative hypotheses. OA Hoio> Hạ: o so3 OC. Hoi o z0 H,: otrue? What error we make when we fail to reject the null hypothesis when the alternative is actually A. Type I B. Type II C. No error Consider the null and alternative hypothesis: Ho: #₁ = µ2, H₂ ₁2. For which of the following 95% confidence intervals would you reject the null hypothesis? A. (-1.5, 2.5) B. (0, 2.5) C. (0.1, 2.5) Suppose you conduct a hypothesis test Ho: P₁ - P2 = 0 versus Ha: P1 P2 > 0 and obtain a test statistic z = 2.5. Which of the following is the correct Matlab command for the p-value? A. normcdf (2.5) B. 1-normcdf (2.5) C. 2*normcdf (2.5) D. 2*(1-normcdf (2.5))149.6 In a certain population the random variable Y has variance equal to 490. Two independent random samples, each of size 20, are drawn. The first sample mean is used as the predictor of the second sample mean. (a) Calculate the expectation, expected square, and variance, of the prediction error. (b) Approximate the probability that the prediction error is less than 14 in absolute value. Show Transcribed Text(a) State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of test statistic to use. ▼(Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the p-value. (Round to three or more decimal places.) (e) Can we conclude that there is a difference in the mean lifetimes of the light bulbs in the two brands? Yes NoYou are conducting a multinomial hypothesis test (a = 0.05) for the claim that all 5 categories are equally likely to be selected. Complete the table. Observed Expected Frequency Frequency Category A 22 B 9. 19 D 5 E 21 Report all answers accurate to three decimal places. But retain unrounded numbers for future calculations. What is the chi-square test-statistic for this data? (Repo and remember to use the unrounded Pearson residuals in your calculations.) swer accurate to three decimal places, What are the degrees of freedom for this test? d.f.= What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =You may need to use the appropriate technology to answer this question. The following data are from a completely randomized design. In the following calculations, use a = 0.05. Treatment Treatment Treatment 3 64 82 69 47 71 53 54 87 60 35 64 46 50 76 57 148.67 108.67 96.67 (a) Use analysis of variance to test for a significant difference among the means of the three treatments.QUESTION 6 A 959% confidence interval of the mean is (11, 17). The result of testing He:H= 13 against H:u#13. at 0.05 level of significance, will be O Do not reject the nulhhypothesis because 13 is between 11 and 17 OThere is insufficient information to make any conclusion about the hypothesis test O Reject the null hypothesis because 13 is more than 11 O Do not reject the the null hypothesis because 13 is less than 17 QUESTIONTest the claim about the population variance o² at the level of significance a. Assume the population is normally distributed. Claim: o² ≤17.1; x = 0.01 Sample statistics: s² = 25.13, n = 41 Write the null and alternative hypotheses. Ho: H₂:0²SEE MORE QUESTIONS