Question
In: Statistics and Probability
A) Given a sample of 15 and looking at a 95% confidence interval. What is the...
A) Given a sample of 15 and looking at a 95% confidence interval. What is the right critical value ()?
B) What is the left critical value ()
Solutions
Expert Solution
a.
b.
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orchestra answered 1 year agoRelated Solutions
Construct a 95% confidence interval for the population standard deviation of a random sample of 15...
Construct a 95% confidence interval for the population standard
deviation of a random sample of 15 crates which have a mean weight
of 165.2 points and a standard deviation of 12.9 pounds. Assume the
population is normallyn distributed.
A. 9.9, 18.8
B. 9.4, 20.3
Please show work.
Given a normal distribution of scores calculate 95% confidence interval for the standard deviation? Given: Sample...
Given a normal distribution of scores calculate 95% confidence
interval for the standard deviation? Given: Sample mean = 87.1667.
Sample size is 12. Sample variance = 60.88.
2. What is the sample size, n, for a 95% confidence interval on the mean, if...
2. What is the sample size, n, for a 95% confidence interval on
the mean, if we know that the process’ standard error is 3.2 units,
and we want to allow at most 1.0 units for our error?
3. Let’s say that you just randomly pulled 32 widgets from your
production line and you determined that you need a sample size of
46 widgets, However, you get delayed in being able to pull another
bunch of widgets from the line...
A sample of 114 patients were given a drug to lower cholesterol. A 95% confidence interval...
A sample of 114 patients were given a drug to lower cholesterol.
A 95% confidence interval for the mean reduction in cholesterol (in
mmol/L) was (0.88, 1.02). What was the sample standard deviation of
the reduction amounts? The standard deviation was ? mmol/L.
13) What is the minimal sample size needed for a 95% confidence interval to have a...
13) What is the minimal sample size needed for a 95% confidence
interval to have a maximal margin of error of 0.1 in the following
scenarios? (Round your answers up the nearest whole number.) (a) a
preliminary estimate for p is 0.28 (b) there is no preliminary
estimate for p
What is the minimal sample size needed for a 95% confidence interval to have a maximal...
What is the minimal sample size needed for a 95% confidence
interval to have a maximal margin of error of 0.1 in the following
scenarios? (Round your answers up the nearest whole number.)
(a) a preliminary estimate for p is 0.16
(b) there is no preliminary estimate for p
What is the minimal sample size needed for a 95% confidence interval to have a maximal...
What is the minimal sample size needed for a 95% confidence
interval to have a maximal margin of error of 0.1 in the following
scenarios? (Round your answers up the nearest whole number.)
(a) a preliminary estimate for p is 0.28
(b) there is no preliminary estimate for p
What is the minimal sample size needed for a 95% confidence interval to have a maximal...
What is the minimal sample size needed for a 95% confidence
interval to have a maximal margin of error of 0.1 in the following
scenarios? (Round your answers up the nearest whole number.)
(a) a preliminary estimate for p is 0.39
(b) there is no preliminary estimate for p
what is the minimal sample size needed for a 95% confidence interval to have a maximal...
what is the minimal sample size needed for a 95% confidence
interval to have a maximal margin of error of 0.1 in the following
scenarios? ( Round your answers up to the nearest whole number)
(a) a preliminary estimate for p is 0.34
(b) there is no preliminary estimate for p
What is the minimal sample size needed for a 95% confidence interval to have a maximal...
What is the minimal sample size needed for a 95% confidence
interval to have a maximal margin of error of 0.1 in the following
scenarios? (Round your answers up the nearest whole number.)
(a) a preliminary estimate for p is 0.31
(b) there is no preliminary estimate for p
For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to
rounding.
A random sample of medical files is used to estimate...
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