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
orchestra answered 2 years agoRelated 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...
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