Question
In: Statistics and Probability
In a random sample of 8 people, the mean commute time to work was 35.5 minutes...
In a random sample of 8 people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.4 minutes. A 90% confidence interval using the t-distribution was calculated to be (30.5,40.5). After researching commute times to work, it was found that the population standard deviation is 9.2 minutes. Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results. Round to one decimal point
The Margin of error for the mean is?
a 90% confidence interval using the standard normal distribution is?
Compare the results
Solutions
orchestra answered 1 year agoRelated Solutions
In a random sample of 8 people, the mean commute time to work was 35.5 minutes...
In a random sample of
8
people, the mean commute time to work was
35.5
minutes and the standard deviation was
7.3
minutes. A
98%
confidence interval using the t-distribution was calculated to
be
left parenthesis 27.8 comma 43.2 right
parenthesis(27.8,43.2).
After researching commute times to work, it was found that the
population standard deviation is
8.7
minutes. Find the margin of error and construct a
98%
confidence interval using the standard normal distribution with
the appropriate calculations for a...
In a random sample of 8 people, the mean commute time to work was 36.5 minutes...
In a random sample of 8 people, the mean commute time to work
was 36.5 minutes and the standard deviation was 7.3
minutes. A 90% confidence interval using the t-distribution
was calculated to be (31.6,41.4).
After researching commute times to work, it was found that the
population standard deviation is 9.3.
minutes. Find the margin of error and construct a 90%
confidence interval using the standard normal distribution with the
appropriate calculations for a standard deviation that is known.
Compare...
In a random sample of 29 people, the mean commute time to work was 32.5 minutes...
In a random sample of 29 people, the mean commute time to work
was 32.5 minutes and the standard deviation was 7.3 minutes. Assume
the population is normally distributed and use a
t-distribution to construct a 95% confidence interval for the
population mean mu. What is the margin of error of mu? Interpret
the results. Round to one decimal place as needed.
In a random sample of 17 people, the mean commute time to work was 30.1 minutes...
In a random sample of 17 people, the mean commute time to work
was 30.1 minutes and the standard deviation was 7.3 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 99% confidence interval for the population mean mu.
What is the margin of error of mu? Interpret the results.
In a random sample of 18 people, the mean commute time to work was 34.7 minutes...
In a random sample of 18 people, the mean commute time to work
was 34.7 minutes and the standard deviation was 7.3 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 80% confidence interval for the population mean μ. What
is the margin of error of μ? Interpret the results.
In a random sample of 21 people, the mean commute time to work was 34.1 minutes...
In a random sample of 21 people, the mean commute time to work
was 34.1 minutes and the standard deviation was 7.2 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 99% confidence interval for the population mean μ.
What is the margin of error of μ? Interpret the results.
The confidence interval for the population mean μ is __,__
(Round to one decimal place as needed.)
The margin of error of μ is __,__...
In a random sample of 22 people, the mean commute time to work was 34.5 minutes...
In a random sample of 22 people, the mean commute time to work
was 34.5 minutes and the standard deviation was 7.2 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 90% confidence interval for the population mean mu.
What is the margin of error of mu? Interpret the results
In a random sample of 22 people, the mean commute time to work was 34.5 minutes...
In a random sample of 22 people, the mean commute time to work
was 34.5 minutes and the standard deviation was 7.2 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 90% confidence interval for the population mean mu.
What is the margin of error of mu? Interpret the results
In a random sample of 23 people, the mean commute time to work was 31.2 minutes...
In a random sample of 23 people, the mean commute time to work
was 31.2 minutes and the standard deviation was 7.3 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 98% confidence interval for the population mean μ.
What is the margin of error of μ? Interpret the results.
In a random sample of 28 people, the mean commute time to work was 34.4 minutes...
In a random sample of 28 people, the mean commute time to work
was 34.4 minutes and the standard deviation was 7.3 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 98% confidence interval for the population mean mu.
What is the margin of error of mu?
The confidence interval for the population mean mu is (__,
__)
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