Question

In a random sample of 20 people, the mean commute time to work was 32.6 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 mu. What is the margin of error of u? Interpret the results.

The confidence interval for the population mean u is?

What is the margin of error?

Answer #1

In a random sample of 18 people, the mean commute time to work
was 33.1 minutes and the standard deviation was 7.2 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? Interpret the results.
The confidence interval for the population mean mu is:
The margin of error of mu is:

In a random sample of 18 people, the mean commute time to work
was 32.4 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 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 32.1 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 μ.
What is the margin of error of μ? Interpret the results.

In a random sample of 27 people, the mean commute time to work
was 33.3 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 mu.
What is the margin of error of mu? Interpret the results.
The confidence interval for the population mean μ
(Round to one decimal place as needed.)
The margin of error of μ
Round to one decimal...

In a random sample of 21 ?people, the mean commute time to work
was 31.5 minutes and the standard deviation was 7.2 minutes. Assume
the population is normally distributed and use a? t-distribution to
construct a 80?% confidence interval for the population mean ?.
What is the margin of error of ???
Interpret the results.

In a random sample of 21 people, the mean commute time to work
was 31.3 minutes and the standard deviation was 7.2 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? Interpret the results. The
confidence interval for the population mean mu is left parenthesis
nothing comma nothing right parenthesis . (Round to one decimal
place as needed.) The...

in a random sample of 17 people, the mean commute time to work
was 31.2 minutes and the standard deviation was 7.1 minutes.Assume
the population is normally distributed and use a t-distribution to
construct a 80% confidence interval for the population mean. what
is the margin of error of the mean? interpret the results. the
confidence interval for the population mean is ?

In a random sample of 29 people, the mean commute time to work
was 30.1 minutes and the standard deviation was 7.2 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 28 people, the mean commute time to work
was 33.6 minutes and the standard deviation was 7.1 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.

In a random sample of 28 people, the mean commute time to work
was 33.5 minutes and the standard deviation was 7.3 minutes. Assume
the population is normally distributed and use a t-distribution to
construct a 90% confidence interval for the population mean
muμ.
What is the margin of error ofmuμ?

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