Question
In: Statistics and Probability
In a large midwestern university (the class of entering freshmen is 6000 or more students), an...
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In a large midwestern university (the class of entering freshmen is 6000 or more students), an SRS of 100 entering freshmen in 1999 found that 20 finished in the bottom third of their high school class. Admission standards at the university were tightened in 2000. In 2001, an SRS of 100 entering freshmen found that 10 finished in the bottom third of their high school class. Let p1 and p2 be the proportion of all entering freshmen in 1999 and 2001, respectively, who graduated in the bottom third of their high school class.Is there evidence that the proportion of freshmen who graduated in the bottom third of their high school class in 2001 has been reduced, as a result of the tougher admission standards adopted in 2000, compared with the proportion in 1999? To determine this, you test the hypotheses H0: p1 = p2, Ha: p1 > p2. What conclusion should we make if we test at the 0.05 level of significance? |
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A. We reject the null hypothesis B. We fail to reject the null hypothesis |
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Solutions
orchestra answered 1 year agoRelated Solutions
In a large midwestern university (the class of entering freshmen is 6000 or more students), an...
In a large midwestern university (the class of entering freshmen
is 6000 or more students), an SRS of 100 entering freshmen in 1999
found that 20 finished in the bottom third of their high school
class. Admission standards at the university were
tightened in 2000. In 2001, an SRS of 100 entering
freshmen found that 10 finished in the bottom third of their high
school class. Let p1 and p2 be the
proportion of all entering freshmen in 1999 and 2001, respectively,
who...
QUESTION 5 In a large midwestern university (the class of entering freshmen is 6000 or more...
QUESTION 5
In a large midwestern university (the class of entering freshmen
is 6000 or more students), an SRS of 100 entering freshmen in 1999
found that 25 finished in the bottom third of their high school
class. Admission standards at the university were tightened in
2000. In 2001, an SRS of 100 entering freshmen found that 15
finished in the bottom third of their high school class.
Let p1 and p2 be the proportion of all
entering freshmen in...
At a large university, freshmen students are required to take an introduction to writing class. Students...
At a large university, freshmen students are required to take an
introduction to writing class. Students are given a survey on their
attitudes towards writing at the beginning and end of class. Each
student receives a score between 0 and 100 (the higher the score,
the more favorable the attitude toward writing). The scores of nine
different students from the beginning and end of class are shown
below. Use the Wilcoxon signed-rank test to check at a 5%
significance level...
In a large Midwestern university, a random sample of 100 entering freshman in 2009 found that...
In a large Midwestern university, a random sample of 100
entering freshman in 2009 found that 20 finished in the bottom
third of their high school class. Admission standards at the
university were tightened the next year. In 2011, a random sample
of 100 entering freshman found that 10 had finished in the bottom
third of their high school class. Let p1 be the proportion of
admitted freshman who had finished in the bottom third of their
high school class...
A large Midwestern university is interested in estimating the mean time that students spend at the...
A large Midwestern university is interested in estimating the
mean time that students spend at the student recreation center per
week. A previous study indicated that the standard deviation in
time is about 25 minutes per week. If the officials wish to
estimate the mean time within ± 4 minutes with a 90 percent
confidence, what should the sample size be?
106
Can't be determined without the sample mean.
105
105.685
At a certain university, 50% of all entering freshmen planned to major in a STEM (science,...
At a certain university, 50% of all entering freshmen planned to
major in a STEM (science, technology, engineering, mathematics)
discipline. A sample of 36 freshmen is selected. What is the
probability that the proportion of freshmen in the sample is
between 0.499 and 0.580? Write only a number as your answer. Round
to 4 decimal places (for example 0.3748). Do not write as a
percentage.
74% of freshmen entering public high schools in 2006 graduated with their class in 2010. A...
74% of freshmen entering public high schools in 2006 graduated
with their class in 2010. A random sample of 81 freshmen is
selected. Find the probability that the proportion of students who
graduated is greater than 0.750 . Write only a number as your
answer. Round to 4 decimal places (for example 0.1048). Do not
write as a percentage.
At a Midwestern University the 450 students in the Business School were classified according to their...
At a Midwestern University the 450 students in the
Business School were classified according to their major within the
business school and their gender. The results are:
Female
Male
Total
Accounting
68
56
124
Administration
91
40
131
Economics
5
6
11
Finance
61
59
120
Other
39
25
64
Total
264
186
450
Complete a table for marginal distribution.
Complete a table for Conditional distribution
At a Midwestern University the 386 students in the Business School were classified according to their...
At a Midwestern University the 386 students in the Business
School were classified according to their major within the business
school and their gender. The results follow.
Female
Male
Accounting
68
56
124
Administration
91
40
131
Economics
5
6
11
Finance
61
59
120
225
161
386
Find the probability that the selected student is a finance
major and a male.
b. Find the probability that the selected student is an
administration major or a finance major.
c. Find...
A local university wants to conduct a sample of 200 students out of 6000 students. We...
A local university wants to conduct a sample of 200 students out
of 6000 students. We can assume that the university maintains a
good roster of all registered students. (1) how would you select
the 200 students(a) using simple random sample method and (b)
systematic sampling method? (2) suppose that the university
administration wants to make sure in particular students who major
in music (a small department with only 8% of students major in
music)be adequately included in your sample,...
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