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 elephants. Fifty (50) newborn elephants are weighed. The sample mean is 244 pounds. The sample standard deviation is 11 pounds.

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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 elephants. Fifty (50) newborn
elephants are weighed. The sample mean
is 244 pounds. The sample standard
deviation is 11 pounds.
Identify the following:
1.
a. x =
b. o =
c. n =
2.
Which distribution should you use
for this problem?
3.
Construct a 95% confidence
interval for the population mean weight
of newborn elephants. calculate the error
bound. State the confidence interval.
What will happen to the
confidence interval obtained, if 500
newborn elephants are weighed instead
of 50? Why?
4.
Transcribed Image Text: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 elephants. Fifty (50) newborn elephants are weighed. The sample mean is 244 pounds. The sample standard deviation is 11 pounds. Identify the following: 1. a. x = b. o = c. n = 2. Which distribution should you use for this problem? 3. Construct a 95% confidence interval for the population mean weight of newborn elephants. calculate the error bound. State the confidence interval. What will happen to the confidence interval obtained, if 500 newborn elephants are weighed instead of 50? Why? 4.
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