Question

The president of the student's union of a large Canadian University reports to the board of directors that psychology students spend more time in the campus pub than business students. A survey was conducted on a random sample of 100 psychology students and a random sample of 100 business students. The survey results for the psychology students gave an average of 52 hours per student in the pub per month, with a variance of 64. For the business students the sample gave an average of 50 hours per student in the pub per month, with a variance of 36.

a) Test whether the sample results support the report made by the president of the student's union. Use α = .10.

b) Find the p-value for the test.

Answer #1

The Office of Student Services at a large western state
university maintains information on the study habits of its
full-time students. Their studies indicate that the mean amount of
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studied follows the normal distribution with a standard deviation
of 15 hours. Suppose we select a random sample of 100 current
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A random sample of 12 second-year university students enrolled
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completion, each student was asked how many hours he or she spent
doing homework in statistics. The data are listed here. It is known
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duration of the 12-week semester, for a total of 36 hours. Test to
determine whether there...

A student advocacy group at a large western university was
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students pay per month. Five randomly selected, off-campus students
were chosen and their respective monthly rent liabilities were
recorded The raw data are found in Table 1. Let "x" denote the
monthly rent reported.
We want to find the standard deviation. The formula for standard
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a. Fill in the missing table cells. Note...

A student group claims that first year students at a university
must study 2.5 hours per night during the
school week. A skeptic suspect that they study less than that on
average. A class survey finds that the
average study time claimed by 269 students is 137 minutes. Regard
these students as a random sample
of all first-year students and suppose we know that study times
follow a Normal distribution with
standard deviation of 65 minutes. Is there evidence that...

1)
A professor
at a large university believes that students take an average of 15
credit hours per term. A random sample of 24 students in her class
of 250 students reported the following number of credit hours that
they were taking: (HINT:
Put into L1 and then choose data when constructing the
test.)
12
13
14
14
15
15
15
16
16
16
16
16
17
17
17
18
18
18
18
19
19
19
20
21
Does this
sample...

Hypothesis testing: A student group claims that first-year
students at a university must study 2.25 hours per night during the
school week. A skeptic suspects that they study less than that on
average. A class survey finds the study time claimed by 259
students is 147 minutes. Regard these students as a random sample
of all 1st year students and suppose what study times follow a
Normal Distribution with a population standard deviation 62
minutes. Test to see if the...

2. The College Board reported that the mean SAT score in 2009
was 540 for all US High School students that took the SAT. A
teacher believes that the mean score for his students is greater
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sample mean score for the 25 students is 565 with a sample standard
deviation of 100. Does he have evidence that his students, on
average, do better than the national...

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...

Scenario 4 A professor at a large university believes that
students take an average of 15 credit hours per term. A random
sample of 24 students in her class of 250 students reported the
following number of credit hours that they were taking: 12 13 14 14
15 15 15 16 16 16 16 16 17 17 17 18 18 18 18 19 19 19 20 21
Questions 17 to 19 pertain to Scenario 4. Question 17 (1
point) Saved...

Using a college cost estimator, the average of campus rental at
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A) (5 points) What would be the mean and
standard error for the distribution of the sample mean?
B) (5 points) What is the probability that the
sample mean would be at least $600?
C) (5 points)What is...

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