Question

6) A zoologist weights 24 newborn African elephants born in captivity. The mean weight of the sample is 180.1 lbs with a standard deviation of 5.7 lbs.

a) Find a 99% confidence interval for the true weight of newborn African elephants born in captivity.

b) Provide the **margin of error** of the interval
as your answer.

**Round your answer to 1 decimal place.**

Answer #1

**Answer:**

**Given
that:**

**A zoologist weights 24 newborn African elephants born in
captivity. The mean weight of the sample is 180.1 lbs with a
standard deviation of 5.7 lbs.**

mean=180.1 ,standard deviation= 5.7 , n=24

**(a) Find a 99% confidence interval for the true weight
of newborn African elephants born in captivity.**

99% confidence interval for the true weight of newborn African elephant born in capacity is

**(b) Provide the margin of error of the interval as your
answer.**

margin of error of the interval

6)
A zoologist weights 19 newborn African elephants born in
captivity. The mean weight of the sample is 185.4 lbs with a
standard deviation of 6.4 lbs.
a) Find a 99% confidence interval for the true weight of newborn
African elephants born in captivity.
b) Provide the margin of error of the interval
as your answer.
Round your answer to 1 decimal place.

5)
A zoologist weights 19 newborn African elephants born in
captivity. The mean weight of the sample is 183.5 lbs with a
standard deviation of 5.3 lbs.
a) Find a 99% confidence interval for the true weight of newborn
African elephants born in captivity.
b) Provide the right endpoint of the interval
as your answer.
Round your answer to 1 decimal place.

5)
A zoologist weights 15 newborn African elephants born in
captivity. The mean weight of the sample is 186.7 lbs with a
standard deviation of 5.8 lbs.
a) Find a 99% confidence interval for the true weight of newborn
African elephants born in captivity.
b) Provide the right endpoint of the interval
as your answer.
Round your answer to 1 decimal place.

The standard deviation of the weights of elephants is known to
be approximately 15 pounds. We wish to construct a 95% confidence
interval for the mean weight of newborn elephant calves. Fifty
newborn elephants are weighed. The sample mean is 244 pounds. The
sample standard deviation is 11 pounds.
Construct a 95% confidence interval for the population mean weight
of newborn elephants. State the confidence interval. (Round your
answers to two decimal places.)
,
Sketch the graph. (Round your answers...

The standard deviation of the weights of elephants is known to
be approximately 15 pounds. We wish to construct a 95% confidence
interval for the mean weight of newborn elephant calves. Fifty
newborn elephants are weighed. The sample mean is 244 pounds. The
sample standard deviation is 11 pounds.
A) Construct a 95% confidence interval for the population mean
weight of newborn elephants.
B) What will happen to the confidence interval obtained, if 500
newborn elephants are weighed instead of...

The standard deviation of the weights of elephants is known to
be approximately 15 pounds. We wish to construct a 95% confidence
interval for the mean weight of newborn elephant calves. Fifty
newborn elephants are weighed. The sample mean is 244 pounds. The
sample standard deviation is 11 pounds.
Identify the following: x¯ = σ = n =
In words, define the random variables X and X¯.
Construct a 95% confidence interval for the population mean
weight of newborn elephants....

please do steps
11 - The mean weight of 10 randomly selected newborn babies at a
local hospital is 7.14 lbs and the standard deviation is 0.87 lbs.
Assume the weight of newborn babies has approximately normal
distribution. a. Find the margin of error for the 95% confidence
interval for the mean weight of all newborn babies at this
hospital. b. Use information from part (a) to fill in the blanks in
the following sentence: __________ of all samples of...

The mean weight of 10 randomly newborn babies at a local
hospital is 7.14 lbs and
the standard deviation of 0.817 lbs. Assume the weight of newborn
babies has
approximately normal distribution.
a. Find the margin of error for a confidence level of 90%.
b. Fill in the blanks in the following sentence.
% of all samples of size have sample means within of the
population mean.
c. Find the 90% confidence interval for the mean weight at this
hospital.

You measure 24 turtles' weights, and find they have a mean
weight of 72 ounces. Assume the population standard deviation is
12.7 ounces. Based on this, what is the maximal margin of error
associated with a 95% confidence interval for the true population
mean turtle weight.
Give your answer as a decimal, to two places
±± ounces

To determine the average lifespan of the African bull elephant,
a zoologist collects data on 15 bull elephants. The following table
shows the lifespan,
in years, of 15 African bull elephants. Assume lifespans to be
normally distributed.
15.2 23.1 7.5 27.3 25.6
37.1 31.4 36.1 24 .1 27.1
26.7 28.4 9.4 21.9 20.9
In class, we concluded:
Based on this sample, we are 90% confident that the mean lifespan
of all African bull
elephants is between 20.277 and 27.963 years....

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