Question
Randomly selected students participated in an experiment to test their ability to determine when one minute...
Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 59.7 seconds. Assuming that sigma =10.1 seconds, construct and interpret a 90% confidence interval estimate of the population mean of all students.
What is the 90% confidence interval for the population mean μ?
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
Randomly selected students participated in an experiment to test their ability to determine when one minute...
Randomly selected students participated in an experiment to test
their ability to determine when one minute (or sixty seconds) has
passed. Forty students yielded a sample mean of 62.4 seconds.
Assuming that σ=8.5 seconds, construct and interpret a 99%
confidence interval estimate of the population mean of all
students.
What is the 99% confidence interval for the population mean
μ?
____<μ<_____
Randomly selected statistics students participated in an experiment to test their ability to determine when 1...
Randomly selected statistics students participated in an
experiment to test their ability to determine when 1 minute (or 60
seconds) has passed. Forty students yielded a sample mean of 58.3
sec with a standard deviation is 9.5 sec, construct a 95%
confidence interval estimate of the population mean of all
statistics students.
A. 50.4 sec < mu < 77.8
B. 54.5 sec < mu < 63.2
C. 56.3 sec < mu < 62.5
D. 55.4 sec < mu < 61.2
Based on the Confidence...
Randomly selected statistics students of the author participated in an experiment to test their ability to...
Randomly selected statistics students of the author participated
in an experiment to test their ability to determine when 60 seconds
has passed. Forty students yielded a sample mean of
57.3 sec. Assume that the population standard deviation is σ =
8.5 sec.
a) Find the critical value zα /2 for a 82% confidence
interval
b) Construct a 82% confidence interval estimate of the
population mean of all statistics students. Use the z-table
method.
c) Use TI84/83 calculator method.
d) Write...
Time perception. Randomly selected college students participated in an experiment that tested their ability to determine...
Time perception. Randomly selected college students participated
in an experiment that tested their ability to determine the course
of 1 minute (or 60 seconds). Forty students produced a sample mean
of 58.3 seconds. Assuming that the standard deviation is 9.5
seconds, use a significance level of 0.05 to test the assertion
that the population mean is less than 60 seconds.
Actual times (in seconds) recorded when statistics students participated in an experiment to test their ability...
Actual times (in seconds) recorded when statistics students
participated in an experiment to test their ability to determine
when one minute (60 seconds) had passed are shown below. Find the
mean, median, and mode of the listed numbers.
55 50 74 61 67 60 47 47
A sample of 25 randomly selected students has a mean test score of 81.5 with a...
A sample of 25 randomly selected students has a mean test score
of 81.5 with a standard deviation of 10.2. Assuming that the
population has a normal distribution, use this sample data to
construct a 95% confidence interval for the population mean μ of
all test scores.
A. (77.29, 85.71)
B. (56.12, 78.34)
C. (87.12, 98.32)
D. (66.35, 69.89)
2. The principal randomly selected six students to take an aptitude test. Their scores (from a...
2. The principal randomly selected six students to take an
aptitude test. Their scores (from a normal distribution) were:
83.0 84.1 83.5 83.7 84.1 73.5
a. Determine a 90 percent confidence
interval for the mean score for all students. Show all
work. Identify the standard error, and all calculations
of the margin of error. Does it appear as if the mean score was
better than 84? Write the findings as you would in a
report (interpret the interval.)
b.Assume now that sigma was...
The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of...
The
annual earnings of 13 randomly selected computer software engineers
have a sample standard deviation of $ 3660. Assume the sample is
from a normally distributed population. Construct a confidence
interval for the population variance sigma squared and the
population standard deviation sigma. Use a 90 % level of
confidence. Interpret the results.
The data set represents the scores of 12 randomly selected students on the SAT Physics Subject...
The data set represents the scores of 12 randomly selected
students on the SAT Physics Subject Test. Assume the population
test scores are normally distributed and the population standard
deviation is 103. (Adapted from The College Board) 670 740 630 620
730 650 720 620 640 500 670 760
(a) Find the point estimate of the population mean.
(b) Construct a 90% confidence interval for the population mean.
Interpret the results.
(c) Determine the minimum sample size required to be...
16 students were randomly selected from a large group of students taking a certain calculus test....
16 students were randomly selected from a large group of
students taking a certain calculus test. The mean score for the
students in the sample was 86 and the standard deviation was 1.3.
Assume that the scores are normally distributed. Construct a 98%
confidence interval for the mean score, μ, of all students taking
the test. Round your answer to two decimal places.
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 14 minutes ago
asked 15 minutes ago
asked 19 minutes ago
asked 19 minutes ago
asked 20 minutes ago
asked 39 minutes ago
asked 40 minutes ago
asked 57 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago