Assume we observe a confidence interval at level 95% for the theoretical mean of a distribution, obtained from n realizations of an N(u,0) where o is euqal to 5 and assume this confidence interval is [3.6,8.9]. Which of the following statements are true? Veuillez choisir au moins une réponse:
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- Suppose that as a result of a validation study the confidence interval is calculated between A and B (B>A). Under what condition it cannot be said that the model is valid? O a. A<B O b. B>0 Ос. А>,0 O d. A<0 O e. -2A=BA newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 559 randomly selected Americans surveyed, 396 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion of all Americans who favor the new Green initiative is between and b. If many groups of 559 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about percent will not contain the true population proportion.A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 571 randomly selected Americans surveyed, 444 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion of all Americans who favor the new Green initiative is between and b. If many groups of 571 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population proportion of Americans who favor the percent will not contain the true population proportion. Green initiative and about Submit Question
- A newsgroup is interested in constructing a 99% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 529 randomly selected Americans surveyed, 366 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all Americans who favor the new Green initiative is between and b. If many groups of 529 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group.. About percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about percent will not contain the true population proportion. To avoid any round off mistake, please compute at least 2 more digits before rounding off.A student was asked to find a 90% confidence interval for widget width using data from a random sample of size n = 27. Which of the following is a correct interpretation of the interval 14.3 < u < 21.7? The width of all widgets is between 14.3 and 21.7, 90% of the time. We know this is true because the mean of our sample is between 14.3 and 21.7. There is a 90% chance that the width of the widget is between 14.3 and 21.7. With 90% confidence, the mean width of all widgets is between 14.3 and 21.7. O With 90% confidence, the width of a randomly selected widget will be between 14.3 and 21.7. O There is a 90% chance that the mean of a sample of 27 widgets will be between 14.3 and 21.7.28
- A newsgroup is interested in constructing a 95% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 602 randomly selected Americans surveyed, 366 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 95% confidence the proportion of all Americans who favor the new Green initiative is between and b. If many groups of 602 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about percent will not contain the true population proportion.A newsgroup is interested in constructing a 99% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 515 randomly selected Americans surveyed, 396 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all Americans who favor the new Green initiative is between and b. If many groups of 515 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about percent will not contain the true population proportion.1- A researcher wants to learn the ratio of smoking habit among the university students. Out of 1000 male students 300 of them said "yes I am smoking" and out of 800 female students 200 of them said "yes I am smoking". Construct % 99 confidence interval for the smoking habit for female students. (use three decimal) a) None of them correct 3831o b) 0.250, 0.304 0.236 , 0.318 0.092, 0.130 0.211, 0.289
- Find the confidence interval for a Related-Samples t-test (Ch.11), given the following info: Level of confidence = 99% Before and After scores = see table below SSD (SS of the difference scores) = 2.75 Hint: as you’re doing calculations, don’t round any numbers in your calculations to less than two decimal places, or your final answer may be too rounded for you to be able to tell which answer below is correct. Person Before X1 After X2 Difference (D = X2- X1) A 15 22 +7 B 18 23 +5 C 12 17 +5 D 17 23 +6 A. 1.90 < μD < 7.18 B. 2.53 < μD < 8.02 C. 2.95 < μD < 8.55 D. 2.01 < μD < 7.58How many adults should be involved in this study in order to have the mean age estimated up to ±6 months with 92% and 98% confidence levels?A newsgroup is interested in constructing a 99% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 570 randomly selected Americans surveyed, 440 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all Americans who favor the new Green initiative is between and b. If many groups of 570 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population proportion of Americans who favor the percent will not contain the true population proportion. Green initiative and about