Question

Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from $3.13 to $3.61. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample mean and the maximal margin of error E. (Round your answers to two decimal places.)

x = $

E = $

Answer #1

Suppose you are told that a 95% confidence interval for the
average price of a gallon of regular gasoline in your state is from
$3.43 to $3.77. Use the fact that the confidence interval for the
mean is in the form x − E to x +
E to compute the sample mean and the maximal margin of
error E. (Round your answers to two decimal places.)
x = $
E = $

Suppose you are told that a 95% confidence interval for the
average price of a gallon of regular gasoline in your state is from
$3.21 to $3.67. Use the fact that the confidence interval for the
mean is in the form x − E to x +
E to compute the sample mean and the maximal margin of
error E. (Round your answers to two decimal places.)
x = $
E = $

Suppose you are told that a 95% confidence interval for the
average price of a gallon of regular gasoline in your state is from
$3.23 to $4.20. Use the fact that the confidence interval for the
mean is in the form x − Eto x +
E to compute the sample mean and the maximal margin of
error E. (Round your answers to two decimal places.)
x = $
E = $

Construct a 90% confidence interval of the average gasoline
price per gallon based on a recent sample of 48 stations. The
sample mean was $2.63. Assume the population std deviation is
$0.31

A 95% confidence interval for a population mean is given as 32.2
< μ < 42.0. Round your answers to 1 decimal place.
(a) Calculate the sample mean. x =
(b) Calculate the margin of error. E =

Question #1
For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to
rounding.
Santa Fe black-on-white is a type of pottery commonly found at
archaeological excavations at a certain monument. At one excavation
site a sample of 602 potsherds was found, of which 370 were
identified as Santa Fe black-on-white. Let p represent the
proportion of Santa Fe black-on-white potsherds at the excavation
site. Find a point estimate for p....

Finding x and E: A 95%
confidence interval for a population mean is given as 32.8 <
μ < 42.8. Round your answers to 1 decimal
place.
(a) Calculate the sample mean.
x =
(b) Calculate the margin of error.
E =

A 95% confidence interval is calculated for the average revenue
earned for a specific procedure using a sample. Choose the most
appropriate answer response for calculating the lower confidence
limit.
A. Subtract the margin of error from the population mean
B. Add the margin of error to the sample mean
C. Add the standard error of the mean to the sample mean
D. Subtract the standard error of the mean from the sample
mean
E. Subtract the margin of error...

What is the minimal sample size needed for a 95% confidence
interval to have a maximal margin of error of 0.1 in the following
scenarios? (Round your answers up the nearest whole number.) (a) a
preliminary estimate for p is 0.38

3. A company that supplies gasoline nationwide reports that the
average price per gallon of regular gasoline is $ 8,150, with a
standard deviation of $ 428. There are 750 gasoline stations in the
country. Suppose a random sample from 40 gas stations is
selected.
b. What is the mean or expected value of the sample distribution
of the means?
c. What is the standard error of the sample distribution of the
means?
d. Write the syntax for the sample...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 8 minutes ago

asked 9 minutes ago

asked 13 minutes ago

asked 14 minutes ago

asked 27 minutes ago

asked 33 minutes ago

asked 36 minutes ago

asked 37 minutes ago

asked 47 minutes ago

asked 47 minutes ago

asked 56 minutes ago