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. Thirty randomly selected students took the calculus final. If the sample mean was 90 and the standard deviation s = 6.7, construct a 99% confidence interval for the mean score of all students

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. Thirty randomly selected
students took the calculus final. If the sample mean was 95 and the
standard deviation was 6.6, construct a 99% confidence interval
for the mean score of all students.
A.92.95 <μ <97.05
B.92.03 <μ <97.97
C.91.69 <μ <98.31
D.91.68 <μ <98.32

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.

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.
n = 30, = 84.2, s = 18.4, 90% confidence

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.
n =30,x bar =84.6, s=10.5, 90% confidence
.
A.79.32 <μ <89.88
B.81.34 <μ <87.86
C. 80.68 <μ <88.52
D.81.36 <μ <87.84

Use the given degree of confidence and sample data to construct
a confidence interval for the population mean. Assume that the
population has a normal distribution n=96 x=87.1 standard
deviation=6.2; 99% confidence

Use given degree of confidence and sample data to construct a
confidence interval for the population mean. Assume that the
population has a normal distribution. N=30, sample mean =84.6,
s=10.5%, 90% confidence

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.
The football coach randomly selected ten players and timed how long
each player took to perform a certain drill. The times (in minutes)
were:
7.1 10.5 9.0 8.9 11.2
7.0 6.3 11.1 10.8 12.3
Determine a 95% confidence interval for the mean time for all
players.
Select one:
a. 10.93 min < μ...

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

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 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

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