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Homework 27: Problem 1 Previous Problem Problem List Next Problem (1 point) Lois thinks that people living in a rural environment have a healthier lifestyle than other people. She believes the average lifespan in the USA is 77 years. A random sample of 18 obituaries from newspapers from rural towns in Idaho give 78.39 and s= 1.66. Does this sample provide evidence that people living in rural Idaho communities live longer than 77 years? = (a) State the null and alternative hypotheses: (Type "mu" for the symbol μ, e.g. mu >1 for the mean is greater than 1, mu < 1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1) Но Ha (b) Find the test statistic, t = (c) Answer the question: Does this sample provide evidence that people living in rural Idaho communities live longer than 77 years? (Use a 10% level of significance) (Type: Yes or No) Note: You can earn partial credit on this problem Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Type here to search H O II 6
MAA MATHEMATICAL ASSOCIATION OF AMERICA Logged in as [email protected]. Log Out > webwork/stat 1401 larie / homework 27/2 Homework 27: Problem 2 Previous Problem Problem List Next Problem - (1 point) The sample mean and standard deviation from a random sample of 32 observations from a normal population were computed as 37 and s= 8. Calculate the t statistic of the test required to determine whether there is enough evidence to infer at the 8% significance level that the population mean is greater than 32. Test Statistic = Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining Email Professor Type here to search O E
MAA MATHEMATICAL ASSOCIATION OF AMERICA > webwork/stat_1401_larie /homework_27/3 Homework 27: Problem 3 Previous Problem Problem List Next Problem (1 point) The hypothesis test Ho: 23 Η :μ / 23 is to be carried out. A random sample is selected, and yields =25 and s= 12. If the value of the t statistic is t -0.645497224367903, what is the sample size? (If rounding is required, round to the nearest integer.) Sample Size = Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. Type here to search O F Logged in as [email protected]. Log Out 27