Question

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.

Answer #1

Solution :

t_{
/2,df} = 2.771

Margin of error = E = t_{/2,df}
* (s /n)

= 2.771 * (7.1 / 28)

**Margin of error = E = 1.83**

The 95% confidence interval estimate of the population mean is,

- E < < + E

33.6 - 1.83 < < 33.6+ 1.83

31.77 < < 35.43

(31.77 , 35.43)

in a random sample of 24 people, the mean commute time to work
was 33.7 minutes and the standard deviation was 7.1 minuets .
assume the population is normally distributed and use a
t-distribution to construct a 99% confidence interval for the
population mean. what is the margin of error of the mean? 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 25 people, the mean commute time to work
was 30.6 minutes and the standard deviation was 7.2 minutes.
Assume the population is normally distributed and use a
t-distribution to construct a 95% confidence interval for the
population mean μ.
What is the margin of error of μ? Interpret the results.
1. The confidence interval for the population mean μ is
(_,_)
2. The margin of error of μ is __
3. Interpret the results.
A.It...

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 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 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?

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 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 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?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 30 minutes ago

asked 39 minutes ago

asked 41 minutes ago

asked 54 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago