Question

**Use the given degree of confidence and sample data to
construct a confidence interval for the population mean**
**µ****. Assume that the population has a normal
distribution.**

A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 239 milligrams with s = 13.3 milligrams. Construct a 95 percent confidence interval for the true mean cholesterol content of all such eggs.

Group of answer choices

(230.4, 247.6)

(230.5, 247.5)

(230.6, 247.4)

(232.1, 245.9)

Answer #1

Use the given degree of confidence and sample data to construct
a confidence interval for the population mean μ. Assume that the
population has a normal distribution. A laboratory tested twelve
chicken eggs and found that the mean amount of cholesterol was 185
milligrams with s=17.6 milligrams. Construct a 95% confidence
interval for the true mean cholesterol content of all such
eggs.
A.173.7mg <μ <196.3mg
B.173.8mg <μ <196.2mg
C.175.9mg <μ <194.1mg
D.173.9mg <μ <196.1mg

Use the given degree of confidence and sample data to construct
a confidence interval for the population standard deviation Assume
that the population has a normal distribution.
A laboratory tested seventy-one chicken eggs and found that the
mean amount of cholesterol was 215milligrams with s =12.1
milligrams. Construct a 90% confidence interval for the true
standard deviation of cholesterol content of all such eggs.
please show work or explain

Find a confidence interval for estimating the population μ.
A laboratory tested 74 chicken eggs and found that the mean
amount of cholesterol was 238 milligrams with milligrams O=16.6.
Construct a 95% confidence interval for the true mean cholesterol
content, μ, of all such eggs

A
laboratory tested twelve chicken eggs and found that the mean
amount of cholesterol was 208 milligrams with s = 18.2 milligrams.
Construct a 95 percent confidence interval for the true mean
cholesterol content of all such eggs.
The mean replacement time for a random sample of 20 washing
machines is 11.0 years and the standard deviation is 2.5
yearsConstruct a 99 % confidence interval for the standard
deviation , o, of the replacement times of all washing machines of...

Use the given degree of confidence and sample data to
construct a confidence interval for the population mean
µ.
39 packages are randomly selected from packages received by a
parcel service. The sample has a mean weight of 21.1 pounds and a
standard deviation of 3.7 pounds. What is the 95 percent confidence
interval for the true mean weight, µ, of all packages received by
the parcel service?
Group of answer choices
(19.7, 22.5)
(19.9, 22.3)
(19.6, 22.6)
(20.1, 22.1)

Use the given degree of confidence and sample data to construct
a confidence interval for the population mean µ. 31 packages are
randomly selected from packages received by a parcel service. The
sample has a mean weight of 15.7 pounds and a standard deviation of
1.7 pounds. What is the 95 percent confidence interval for the true
mean weight, µ, of all packages received by the parcel service?
(15.2, 16.2) (14.9, 16.5) (15.0, 16.4) (15.1, 16.3)

18)
A laboratory tested 73 chicken eggs and found that the mean
amount of cholesterol was 230 milligrams with Η=17.4 milligrams.
Construct a 95% confidence interval for the true mean cholesterol
content, μ,of all such eggs. A)227mg<μ<235mg
B)226mg<μ<234mg C)225mg<μ<233mg
D)225mg<μ<234mg

1. Do one of the following, as appropriate: (a) Find the
critical value zα/2, (b) find the critical value
tα/2, (c) state that neither the normal nor the t
distribution applies.
90%; n = 10; σ is unknown; population appears to be normally
distributed.
Group of answer choices
A. zα/2 = 2.262
B. zα/2 = 1.383
C. tα/2 = 1.833
D. tα/2 = 1.812
2. Find the margin of error.
95% confidence interval; n = 91 ; = 53, s =...

Use the given degree of confidence and sample data to construct
a confidence interval for the population mean µ. Assume that the
population has a normal distribution.
6) The football coach randomly selected ten players and timed
how long each player took to perform a certain drill.
The times (in minutes) were:
7.8
10.6
9.9
8.1
11.5
7.2
6.2
11.1
10.6
12.9
Determine a 95% confidence interval for the mean time for all
players.

Use the given degree of confidence and sample data to
construct a confidence interval for the population mean μ. Assume
that the population has a normal distribution.
A sociologist develops a test to measure attitudes towards public
transportation, and 27 randomly selected subjects are given the
test. Their mean score is x ¯ = 76.2 and their standard deviation
is s = 21.4. Construct the 95% confidence interval for the mean
score of all such subjects.

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