Question

In: Statistics and Probability

Suppose that a recent article stated that the mean time spent in jail by a first-time...

Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. A study was then done to see if the mean time has increased in the new century. A random sample of 27 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was four years with a standard deviation of 1.9 years. Suppose that it is somehow known that the population standard deviation is 1.4. Conduct a hypothesis test to determine if the mean length of jail time has increased. Assume the distribution of the jail times is approximately normal. find the following... a.) x b.) σ    c.) sx d.) n

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

Suppose that a recent article stated that the mean time spent in jail by a first-time...
Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.2 years. A study was then done to see if the mean time has increased in the new century. A random sample of 26 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was three years with a standard deviation of 1.8 years. Conduct a hypothesis test to determine if the...
Suppose that a recent article stated that the mean time spent in jail by a first-time...
Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. A study was then done to see if the mean time has increased in the new century. A random sample of 26 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was 3 years. Suppose that it is somehow known that the population standard deviation is 1.5 years. Conduct...
A recent article in Healthy Life magazine claimed that the mean amount of leisure time per...
A recent article in Healthy Life magazine claimed that the mean amount of leisure time per week for European men is 48.2 hours. The distribution of leisure time amounts is reported to be approximately Normal. You believe the figure of 48.2 is too large and decide to conduct your own test. In a random sample of 25 European men, you find that the mean is 44.6 hours of leisure per week and that the standard deviation of the sample is...
A recent article in Vitality magazine reported that the mean amount of leisure time per week...
A recent article in Vitality magazine reported that the mean amount of leisure time per week for American men is 40.0 hours. You believe this figure is too large and decide to conduct your own test. In a random sample of 60 men, you find that the mean is 37.8 hours of leisure per week and that the standard deviation of the sample is 12.2 hours. Can you conclude that the information in the article is untrue? Use the .05...
Suppose for a random sample of 49 CMU students, the mean amount of time spent eating...
Suppose for a random sample of 49 CMU students, the mean amount of time spent eating or drinking per day is 1.58 hours with a S.D. of 0.62 hours! What is the Margin of Error at a C.L. of 90%? What is the right boundary of the C.I. at a C.L. of 90%?
Suppose for a random sample of 49 CMU students, the mean amount of time spent eating...
Suppose for a random sample of 49 CMU students, the mean amount of time spent eating or drinking per day is 1.58 hours with a S.D. of 0.62 hours! a. What is the Standard Error of the estimate of the population mean? b. What is the Margin of Error at a C.L. of 90%? c. What is the right boundary of the C.I. at a C.L. of 90%? d. At a 98% C.L., if the researcher wants to limit the...
Suppose we somehow know that for the entire population of all students, the mean time spent...
Suppose we somehow know that for the entire population of all students, the mean time spent exercising per week is 90 minutes, with a standard deviation of 40 minutes. a) Would you expect time spent exercising per week to be normally distributed? Explain your reasoning. Consider your exercise habits as well as those of people you know. b) We plan to collect random samples of 50 students and compute the sample mean time spent exercising, ?̅, for each sample. Would...
Suppose we somehow know that for the entire population of all students, the mean time spent...
Suppose we somehow know that for the entire population of all students, the mean time spent exercising per week is 90 minutes, with a standard deviation of 40 minutes. a) Would you expect time spent exercising per week to be normally distributed? Explain your reasoning. Consider your exercise habits as well as those of people you know. b) We plan to collect random samples of 50 students and compute the sample mean time spent exercising, ?̅, for each sample. Would...
A recent article found that Massachusetts residents spent an average of $860.70 on the lottery in...
A recent article found that Massachusetts residents spent an average of $860.70 on the lottery in 2010, more than three times the U.S. average (http://www.businessweek.com, March 14, 2012). A researcher at a Boston think tank believes that Massachusetts residents spend significantly less than this amount. He surveys 100 Massachusetts residents and asks them about their annual expenditures on the lottery. a. Specify the competing hypotheses to test the researcher’s claim. b. Specify the critical value(s) of the test at the...
FASB has spent a considerable amount of time in recent years on the topics of public...
FASB has spent a considerable amount of time in recent years on the topics of public and private business entities. a. How has FASB defined “business entities,” “public business entities,” and “private companies”? 1) For each definition, provide an example of an entity that meets the definition and another example of an entity that does not meet the definition and explain why each entities meets/fails to meet the respective definition. 2) Discuss the practical implications of meeting/not meeting the requirements...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT