Question
In: Statistics and Probability
A simple random sample of 12 e-readers of a certain type had the following minutes of...
A simple random sample of 12 e-readers of a certain type had the following minutes of battery life. 287, 311, 262, 392, 313, 304, 346, 316, 286, 274, 278, 291 Assume that it is reasonable to believe that the population is approximately normal and the population standard deviation is 63. What is the upper bound of the 95% confidence interval for the battery life for all e-readers of this type? Round your answer to one decimal places (for example: 319.4). Write only a number as your answer. Do not write any units.
Solutions
orchestra answered 1 year agoRelated Solutions
A simple random sample of 12 e-readers of a certain type had the following minutes of...
A simple random sample of 12 e-readers of a certain type had the
following minutes of battery life. 287, 311, 262, 392, 313, 260,
320, 316, 286, 256, 303, 291 Assume that it is reasonable to
believe that the population is approximately normal and the
population standard deviation is 76. What is the upper bound of the
95% confidence interval for the battery life for all e-readers of
this type? Round your answer to one decimal places (for example:
319.4)....
Question 12 A simple random sample of 12 e-readers of a certain type had the following...
Question 12
A simple random sample of 12 e-readers of a certain type had the
following minutes of battery life.
287, 311, 262, 392, 313, 263, 293, 316, 286, 301, 287, 291
Assume that it is reasonable to believe that the population is
approximately normal and the population standard deviation is 62.
What is the upper bound of the 95% confidence interval for the
battery life for all e-readers of this type?
Round your answer to one decimal places (for...
A major metropolitan newspaper selected a simple random sample of 544 readers from their list of...
A major metropolitan newspaper selected a simple random sample
of 544 readers from their list of 100,000 subscribers. They asked
whether the paper should increase its coverage of local news, and
33% agreed that they should. What is the upper bound on the 99%
confidence interval for the proportion of readers who would like
more coverage of local news? Round your answer to 3 decimal
places.
A random sample of n = 15 heat pumps of a certain type yielded the following...
A random sample of n = 15 heat pumps of a certain type
yielded the following observations on lifetime (in years):
2.0
1.4
6.0
1.9
5.2
0.4
1.0
5.3
15.6
0.9
4.8
0.9
12.4
5.3
0.6
(a) Assume that the lifetime distribution is exponential and use
an argument parallel to that of this example to obtain a 95% CI for
expected (true average) lifetime. (Round your answers to two
decimal places.)
,
years
(b) How should the interval of part...
A random sample of n = 15 heat pumps of a certain type yielded the following...
A random sample of n = 15 heat pumps of a certain type
yielded the following observations on lifetime (in years):
2.0
1.4
6.0
1.6
5.1
0.4
1.0
5.3
15.7
0.7
4.8
0.9
12.3
5.3
0.6
Assume that the lifetime distribution is exponential and use an
argument parallel to that of this example to obtain a 95% CI for
expected (true average) lifetime. (Round your answers to two
decimal places.)
( , ) years
What is a 95% CI...
A random sample of n = 15 heat pumps of a certain type yielded the following...
A random sample of n = 15 heat pumps of a certain type yielded
the following observations on lifetime (in years):
2.0 1.2 6.0 1.9 5.1 0.4 1.0 5.3 15.6 0.9 4.8 0.9 12.2 5.3 0.6
a.) Assume that the lifetime distribution is exponential and use
an argument parallel to that of this example to obtain a 96% CI for
expected (true average) lifetime (round answer to two decimal
places)
(________, _________) years
c.) What is a 95% CI for...
A random sample of n = 15 heat pumps of a certain type yielded the following...
A random sample of n = 15 heat pumps of a certain type
yielded the following observations on lifetime (in years):
2.0
1.4
6.0
1.8
5.3
0.4
1.0
5.3
15.9
0.8
4.8
0.9
12.1
5.3
0.6
(a) Assume that the lifetime distribution is exponential and use
an argument parallel to that of this example to obtain a 95% CI for
expected (true average) lifetime. (Round your answers to two
decimal places.)
,
years
(b) How should the interval of part...
Given below is simple random sample data for wait times, in minutes, for a call center....
Given below is simple random sample data for wait times, in
minutes, for a call center. At the 98% confidence level, calculate
the confidence interval estimate for the variance in wait time for
the population of all calls at the call center. Assume the
population is normally distributed. 12.1 11.5 13.4 16.2 11.3 12.2
11.3
A random sample of 13 DVD movies had a mean length of 111.6 minutes, with a...
A
random sample of 13 DVD movies had a mean length of 111.6 minutes,
with a standard deviation of 66.9 minutes . Find the lower bound of
the 90% confidence interval for the true mean length of all
Hollywood movies . Assume movie lengths to be approximately
normally distributed .
Round to one decimal place (for example : answer . Do not
write any units . 3.1) . Write only a number as your
In a simple random sample of 70 automobiles registered in a certain state, 26 of them...
In a simple random sample of 70 automobiles registered in a
certain state, 26 of them were found to have emission levels that
exceed a state standard. Can it be concluded that less than half of
the automobiles in the state have pollution levels that exceed the
standard? Find the P-value and state a conclusion. Round the answer
to four decimal places.
- The P-value is : _____
- We can conclude that less than half of the
automobiles in...
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