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In Problems 9–14, the null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. What parameter is being tested?
11.
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Chapter 10 Solutions
Fundamentals of Statistics Plus MyLab Statistics with Pearson eText - Title-Specific Access Card Package (5th Edition)
- The following problem submitted by Daniel Hahn of Blairstown, Iowa, appeared in the Ask Marilyn column of Parade magazine. Source: Parade magazine. You discover two booths at a carnival. Each is tended by an honest man with a pair of covered coin shakers. In each shaker is a single coin, and you are allowed to bet upon the chance that both coins in that booths shakers are heads after the man in the booth shakes them, does an inspection, and can tell you that at least one of the shakers contains a head. The difference is that the man in the first booth always looks inside both of his shakers, whereas the man in the second booth looks inside only one of the shakers. Where will you stand the best chance?arrow_forwardSuppose that we reject a null hypothesis at the 0.02 level of significance. The null hypothesis will definitely also be rejected for all the following α-values except for: A. 0.01B. 0.2C. 0.1D. 0.4E. 0.03arrow_forwardPLEASE HELP WITH THE PROBLEM BELOW Let pm and pf be the respective proportions of male and female white-crowned sparrows that return to their hatching site. We observed that 124 out of 894 males and 70 out of 700 females returned. Does your result agree that there is no difference between the proportions of male and female white-crowned sparrows that return to their hatching site with α = 0.05? Formulate the hypotheses Finish the hypothesis testing and draw your conclusion (use p-value to test the hypotheses)arrow_forward
- Review: Suppose a hypothesis test produces P = 0.0512 Will the null hypothesis be rejected at α = 0.10? How will the outcome of the test change if the level of significance is changed to 0.05? Explain in 1 – 2 complete sentences.arrow_forwardQuestion 5 (10 marks) a. Write the null and alternative hypothesis for the following and determine if it is a two-tailed, a left-tailed or a right-tailed test. i. A researcher is studying the effects of radical exercise program on knee surgery patients. There is a good chance the therapy will improve recovery time, but there's also the possibility it will make it worse. Average recovery times for knee surgery patients is 8.2 weeks. ii. Alumni group of a private institution wants to test if the college student, on the average, take less than 4 years to graduate.arrow_forwardA decade-old study found that the proportion of high school seniors who felt that "getting rich" was an important personal goal was 71%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H, and the alternative hypothesis H, that we would use for this test. Ho: 0 H: 0 Oarrow_forwardUnder alpha 0.05 should you reject or retain the null hypothesisarrow_forwardQuestion 19 For which set of conditions would the CLT NOT apply to compute a hypothesis test? Population is normally distributed. Sample size is 39. Population is normally distributed. Sample size is 19. Population is not normally distributed. Sample size is 39. Population is not normally distributed. Sample size is 19.arrow_forwardA decade-old study found that the proportion of high school seniors who felt that "getting rich" was an important personal goal was 66%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H 00 and the alternative hypothesis H, that we would use for this test. H, :0 H, :0arrow_forward4. Conceptual Question: A one sample t-test is conducted for a data set and you fail to reject the null hypothesis at a =.05. If you conducted the same hypothesis test, but use a =.01 what would be the outcome of the t-test?arrow_forward1. What is the hypothesis for each problem below? When selecting answers: p0 is written "p0", μ0 is written "Mu0", ≠ is written "not =" A company claimed that more than 80% of their employees are satisfied with their employment. Null: H0: [p0 or Mu0] = .8 Alternate: Ha: [p0 or Mu0] [<, not =, or >] .8 A company claims that the average weight for the delivery of their product is less than 2 weeks. Null: H0: [p0 or Mu0] = 2 Alternate: Ha: [p0 or Mu0] [<, not =, or >] 2 A company claims that the average number of years an employee has worked for them is 15 years Null: H0: [p0 or Mu0] = 2 Alternate: Ha: [p0 or Mu0] [<, not =, or >] 2arrow_forward21a. Step 1: Which of the following is the correct set of hypotheses?A. H0: Cravings and relapse are not independent; and H1: Cravings and relapse are independent B. H0: Cravings and relapse are independent; and H1: Cravings and relapse are not independent C. H0: u1 = u2 = u3 = u4; and H1: At least one of the categories will be different than the others. 21b. Expected frequencies for: (round answers to 2 decimal places) Cravings-Yes/Relapse-Yes fe = _______ Cravings-Yes/Relapse-No fe = ________ 21c. Expected frequencies for: (round answers to 2 decimal place) Cravings-No/Relapse-Yes fe = _________ Cravings-No/Relapse-No fe = __________arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Calculus For The Life SciencesCalculusISBN:9780321964038Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.Publisher:Pearson Addison Wesley,
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