Question

A sample of size 52 is taken from a population with an unknown variance. The sample mean is 965.3 and the sample standard deviation is 5.5. Calculate a 99.9% confidence interval. What is the upper limit of the interval? Enter your answer to 1 decimal places.

Answer #1

A sample of size 6 is taken from a population with an unknown
variance. The sample mean is 603.3 and the sample standard
deviation is 189.8. Calculate a 95% confidence interval. What is
the upper limit of the interval? Enter your answer to 1 decimal
places.

A random sample of size n = 52 is taken from a finite population
of size N = 515 with mean μ = 253 and variance σ2 = 398. [You may
find it useful to reference the z table.] a-1. Is it necessary to
apply the finite population correction factor? Yes No a-2.
Calculate the expected value and the standard error of the sample
mean.(Round “expected value” to a whole number and "standard error"
to 4 decimal places.)

A random sample of size 15 is taken from a normally distributed
population revealed a sample mean of 75 and a standard deviation of
5. The upper limit of a 95% confidence interval for the population
mean would equal?

A random sample of size 15 taken from a normally
distributed population revealed a sample mean of 75 and a sample
variance of 25. The upper limit of a 95% confidence interval for
the population mean would equal:
Group of answer choices
72.727.
77.273.
77.769.
72.231.

A sample of data is drawn from an unknown population. The sample
size is n = 30, with a mean of 21.4, and sample standard
deviation of 7. What is the upper confidence limit (UCL) of the 98%
CI?
Round to two decimals and include leading zeros if
necessary.

A random sample of size 16 taken from a normally distributed
population revealed a sample mean of 50 and a sample variance of
36. The upper limit of a 95% confidence interval for the population
mean would equal:
a)57.81
b)53.20
c)69.90
d)75.31

Suppose a random sample of size 11 was taken from a normally
distributed population, and the sample standard deviation was
calculated to be s = 6.5. We'll assume the sample mean is 10 for
convenience. a) Calculate the margin of error for a 90% confidence
interval for the population mean. Round your response to at least 3
decimal places. Number b) Calculate the margin of error for a 95%
confidence interval for the population mean. Round your response to
at...

A sample of size 30 is taken from the population of morel
mushrooms and used to calculate an average height x ¯ = 4.6
centimeters.. Suppose the sample standard deviation is calculated
to be s =0.5. What is the margin of error for a 90% confidence
interval? Round your answer to 3 decimal places.

Estimate the population mean by finding a 99.9% confidence
interval given a sample of size 70, with a mean of 60.5 and a
standard deviation of 9.4.
Preliminary:
Is it safe to assume that n≤0.05 of all subjects in the
population?
Yes
No
Is n≥30?
No
Yes
Confidence Interval: What is the 99.9%
confidence interval to estimate the population mean? Enter your
answer as an open-interval (i.e., parentheses)
to one decimal place.
99.9% C.I. =

A random sample of size is taken from a population that has a
variance of 49. The sample mean is 90.4, n = 9. Construct a 80%
confidence interval for μ.
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