Question
In: Statistics and Probability
Find the level of confidence assigned to an interval estimate of the mean formed using the...
Find the level of confidence assigned to an interval estimate of the mean formed using the following intervals. (Round your answers to four decimal places.)
(a) x − 0.99·σx to
x + 0.99·σx
(b) x − 1.8·σx to x
+ 1.8·σx
(c) x − 2.16·σx to x
+ 2.16·σx
(d) x − 2.66·σx to x
+ 2.66·σx
Solutions
orchestra answered 1 year agoRelated Solutions
Find the level of confidence assigned to an interval estimate of the mean formed using the...
Find the level of confidence assigned to an interval estimate of
the mean formed using the following intervals. (Round your answers
to four decimal places.)
(a) x − 0.93·σx to
x + 0.93·σx
(b) x − 1.67·σx to x
+ 1.67·σx
(c) x − 2.17·σx to x
+ 2.17·σx
(d) x − 2.68·σx to x
+ 2.68·σx
A manager wishes to estimate a population mean using a 90% confidence interval estimate that has...
A manager wishes to estimate a population mean using a 90%
confidence interval estimate that has a margin of error of +- 47.0.
If the population standard deviation is thought to be 640, what is
the required sample
size?
The sample size must be at least _?
Find the confidence interval for the given values of ?, ?, ?⎯⎯⎯, and confidence level. ?=2.1,...
Find the confidence interval for the given values of ?, ?, ?⎯⎯⎯,
and confidence level.
?=2.1, ?=30, ?⎯⎯⎯=4.5, confidence = 0.92
Enter your answer by filling in the blanks ( ____ , ____ ).
Round final answers to 2 decimal places.
Find the confidence interval for the given values of ?, ?, ?⎯⎯⎯, and confidence level. ?=21,...
Find the confidence interval for the given values of ?, ?, ?⎯⎯⎯,
and confidence level.
?=21, ?=42, ?⎯⎯⎯=53, confidence = 0.89
Enter your answer by filling in the blanks ( ____ , ____ ).
Round final answers to 2 decimal places.
Use the given data to find the 95% confidence interval estimate of the population mean μ...
Use the given data to find the 95% confidence interval estimate
of the population mean μ . Assume that the population has a normal
distribution.
IQ scores of professional athletes:
Sample size n=25
Mean=103
Standard deviation s=15
Answer: ____ <μ< _____
Use the given data to find the 95% confidence interval estimate of the population mean μ....
Use the given data to find the 95% confidence interval estimate
of the population mean μ. Assume that the population has a normal
distribution.
IQ scores of professional athletes:
Sample size n=20
Mean x¯¯¯=104
Standard deviation s=14
<μ<
Use the sample data and confidence level to construct the confidence interval estimate of the population...
Use the sample data and confidence level to construct the
confidence interval estimate of the population proportion p. n
equals 550 comma x equals 440 comma 95 % confidence nothingless
thanpless than nothing (Round to three decimal places as
needed.)
Use the sample data and confidence level to construct the confidence interval estimate of the population...
Use the sample data and confidence level to construct the
confidence interval estimate of the population proportion p. n
equals 500 comma x equals 350 comma 95 % confidence nothingless
thanpless than nothing (Round to three decimal places as
needed.)
Suppose we wish to estimate the mean heart rate, using a 95% confidence interval, for a...
Suppose we wish to estimate the mean heart rate, using a 95%
confidence interval, for a par- ticular population. We observe 130
individuals to see a sample mean of 98.249 and a sample standard
deviation of 0.733. We then find the tc-value, corresponding to the
value on the t-distribution (d.f. = 130) so that the area to the
left of it is equal to 95%, which ends up being:
tc ≈ 1.656659.
Next we compute the error and obtain our...
Construct a 95?% confidence interval to estimate the population mean using the following data. What assumptions...
Construct a 95?% confidence interval to estimate the population
mean using the following data. What assumptions need to be made to
construct this? interval?
x?=93
?=15
n=17
With 95?% ?confidence, when n=17 the population mean is between
the lower limit of __ and the upper limit of __
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