Question
In: Statistics and Probability
A random sample of 12 second-year university students enrolled in a business statistics course was drawn....
A random sample of 12 second-year university students enrolled in a business statistics course was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below.
40, 41, 29, 30, 31, 31, 34, 29, 37, 41, 37, 40
It is known that the population standard deviation is 8. The instructor has recommended that students devote 3 hours per week for the duration of the 12-week semester, for a total of 36 hours. Test to determine whether there is evidence at the 0.07 significance level that the average student spent less than the recommended amount of time. Fill in the requested information below.
A. The value of the standardized test statistic:
Note: For the next part, your answer should use interval notation. An answer of the form (−∞,a) is expressed (-infty, a), an answer of the form (b,∞) is expressed (b, infty), and an answer of the form (−∞,a)∪(b,∞) is expressed (-infty, a)U(b, infty).
B. The rejection region for the standardized test statistic:
C. The p-value is
D. Your decision for the hypothesis test:
A. Do Not Reject H0.
B. Do Not Reject H1.
C. Reject H1.
D. Reject H0.
Solutions
orchestra answered 2 years agoRelated Solutions
A random sample of 12 second-year university students enrolled in a business statistics course was drawn....
A random sample of 12 second-year university students enrolled
in a business statistics course was drawn. At the course's
completion, each student was asked how many hours he or she spent
doing homework in statistics. The data are listed below.
281726262620292823271820282626292318172620282720
It is known that the population standard deviation is 9. The
instructor has recommended that students devote 2 hours per week
for the duration of the 12-week semester, for a total of 24 hours.
Test to determine whether there...
A random sample of 12 second-year university students enrolled in a business statistics course was drawn....
A random sample of 12 second-year university students enrolled
in a business statistics course was drawn. At the course’s
completion, each student was asked how many hours he or she spent
doing homework in statistics. The data are listed here. It is know
that the population standard deviation is 8. The instructor has
recommended that the students devote 36 hours to the course for the
semester. Test to determine at the 1% significance level whether
there is evidence that the...
A random sample of 12 second-year university students enrolled in a business statistics course was drawn....
A random sample of 12 second-year university students enrolled
in a business statistics course was drawn. At the course's
completion, each student was asked how many hours he or she spent
doing homework in statistics. The data are listed below. 28 18 15
20 14 25 21 29 20 23 24 26 It is known that the population standard
deviation is 6. The instructor has recommended that students devote
2 hours per week for the duration of the 12-week semester,...
Students enrolled in an introductory statistics course at a university were asked to take a survey...
Students enrolled in an introductory statistics course at a
university were asked to take a survey that indicated whether the
student’s learning style was more visual or verbal. Each student
received a numerical score ranging from -11 to +11. Negative scores
indicated a visual learner, and positive scores indicated a verbal
learner. The closer the score was to -11 or +11, the stronger the
student’s inclination toward that learning style. A score of 0
would indicate neutrality between visual or...
Students enrolled in an introductory statistics course at a university were asked to take a survey...
Students enrolled in an introductory statistics course at a
university were asked to take a survey that indicated whether the
student’s learning style was more visual or verbal. Each student
received a numerical score ranging from -11 to +11. Negative scores
indicated a visual learner, and positive scores indicated a verbal
learner. The closer the score was to -11 or +11, the stronger the
student’s inclination toward that learning style. A score of 0
would indicate neutrality between visual or...
Students enrolled in an introductory statistics course at a university were asked to take a survey...
Students enrolled in an introductory statistics course at a
university were asked to take a survey that indicated whether the
student’s learning style was more visual or verbal. Each student
received a numerical score ranging from -11 to +11. Negative scores
indicated a visual learner, and positive scores indicated a verbal
learner. The closer the score was to -11 or +11, the stronger the
student’s inclination toward that learning style. A score of 0
would indicate neutrality between visual or...
You plan to take a random sample of 1000 undergraduate students enrolled at the University of...
You plan to take a random sample of 1000 undergraduate
students enrolled at the
University of Rochester to compare the proportion of female
and male students who
would like to see that the United States of America have a
female President.
b.Suppose that you use random numbers to select students, but
you stop
selecting females as soon as you have 100, and you stop
selecting males once you
have 100. Is the resulting sample a simple random sample? Why
or...
Consider a population that consists of the 70 students enrolled in a statistics course at a...
Consider a population that consists of the 70 students enrolled
in a statistics course at a large university. If the university
registrar were to compile the grade point averages (GPAs) of all 70
students in the course and compute their average, the result would
be a mean GPA of 2.98. Note that this average is unknown to anyone;
to collect the GPA information would violate the confidentiality of
the students’ academic records.
Suppose that the professor who teaches the course...
A random sample of 4 college students was drawn from a large university. Their ages are...
A random sample of 4 college students was drawn from a large
university. Their ages are 22, 17, 23, and 20 years.
a) Test to determine if we can infer at the 5% significance
level that the population mean is not equal to 20.
b) Interpret your conclusion.
8. At a university with 1,000 business majors, there are 200 business students enrolled in an...
8. At a university with 1,000 business majors, there are 200
business students enrolled in an introductory Accounting course. Of
these 200 students, 50 are also enrolled in an introductory
Statistics course. There are an additional 250 business students
enrolled in Statistics but not enrolled in Accounting. If a
business student is selected at random, what is the probability
that the student is either enrolled in Accounting or Statistics or
in both courses?
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