Question

140 students at a college were asked whether they had completed
their required English 101 course, and 91 students said "yes".
Construct the 99% confidence interval for the proportion of
students at the college who have completed their required English
101 course.

Enter your answers as decimals (not percents) accurate to three
decimal places.

The Confidence Interval is ( , )

Answer #1

140 students at a college were asked whether they had completed
their required English 101 course, and 91 students said "yes".
Construct the 99% confidence interval for the proportion of
students at the college who have completed their required English
101 course.
Enter your answers as decimals (not percents) accurate to three
decimal places.
The Confidence Interval is ( , )

138 students at a college were asked whether they had completed
their required English 101 course, and 109 students said "yes".
Construct the 90% confidence interval for the proportion of
students at the college who have completed their required English
101 course.
Enter your answers as decimals (not percents) accurate to three
decimal places.
The Confidence Interval is ( , )

30 randomly selected college students were asked whether they
prefer to watch football or basketball. 8 students said they prefer
to watch basketball, while the remaining 22 said they prefer to
watch football. Go to www.lock5stat.com/StatKey/Links to an
external site., but click 'CI for Single Proportion' instead of ‘CI
for Single Mean, Median, St.Dev.’ Click on the button near the top
of the page that says ‘Edit Data.’ Enter the count and sample size
giving in this problem. Then, click...

In a recent survey of 100 college students, 49% had received the
HPV vaccine. Construct a 99% confidence interval for the proportion
of college students who have received the vaccine.
- Report the interval as a complete sentence in the context of
the problem.
- Would a 95% confidence interval be narrower or wider? Why?
- Is it possible that the true proportion of vaccinate college
students is over 50%? Why or why not?

In a recent survey conducted by a professor of UM, 200 students
were asked whether or not they have a satisfying experience with
the e-learning approach adopted by the school in the current
semester. Among the 200 students interviewed, 121 said they have a
satisfying experience. What is the 99% confidence interval for the
proportion of all UM students who have a satisfying experience with
the e-learning approach?

Ages of students: A simple random sample of 100
U.S. college students had a mean age of 22.68 years. Assume the
population standard deviation is σ = 4.74 years. Construct
a 99% confidence interval for the mean age of U.S. college
students.
The answer I posted my instructor says it is wrong. I came up
with 21.45 to 23.91 a 99% confidence interval for the mean of the
U.S college students
She said the z procedures are needed.
Thanks.

In a recent survey conducted by a professor of UM, 200 students
were asked whether or not they have a satisfying experience with
the e-learning approach adopted by the school in the current
semester. Among the 200 students interviewed, 121 said they have a
satisfying experience. What is the 99% confidence interval for the
proportion of all UM students who have a satisfying experience with
the e-learning approach?
Select one:
a. 0.516 to 0.694
b. 0.548 to 0.662
c. 0.524...

In a recent survey conducted by a professor of UM, 200 students
were asked whether or not they have a satisfying experience with
the e-learning approach adopted by the school in the current
semester. Among the 200 students interviewed, 121 said they have a
satisfying experience. What is the 99% confidence interval for the
proportion of all UM students who have a satisfying experience with
the e-learning approach? Select one: a. 0.524 to 0.686 b. 0.516 to
0.694 c. 0.537...

A random sample of 205 college students was asked if they
believed that places could be haunted, and 65 responded yes.
Estimate the true proportion of college students who believe in the
possibility of haunted places with 99% confidence. According to
Time magazine, 37% of all Americans believe that places can be
haunted.

In a recent poll, 600 people were asked if they liked soccer,
and 10% said they did. Based on this, construct a 90% confidence
interval for the true population proportion of people who like
soccer.
As in the reading, in your calculations:
--Use z = 1.645 for a 90% confidence interval
--Use z = 2 for a 95% confidence interval
--Use z = 2.576 for a 99% confidence interval.
Give your answers as decimals, to 4 decimal places.
[________, ________]

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