Question
In: Statistics and Probability
Consider a normal population with an unknown population standard deviation. A random sample results in x−...
Consider a normal population with an unknown population standard deviation. A random sample results in x− = 48.44 and s2 = 10.89. [You may find it useful to reference the t table.] a. Compute the 90% confidence interval for μ if x− and s2 were obtained from a sample of 7 observations. (Round intermediate calculations to at least 4 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.) b. Compute the 90% confidence interval for μ if x− and s2 were obtained from a sample of 19 observations.
Solutions
orchestra answered 2 years agoRelated Solutions
Consider a normal population with an unknown population standard deviation. A random sample results in x−...
Consider a normal population with an unknown population standard
deviation. A random sample results in x− = 47.50 and s2 = 27.04. a.
Compute the 90% confidence interval for μ if x− and s2 were
obtained from a sample of 15 observations. (Round intermediate
calculations to at least 4 decimal places. Round "t" value to 3
decimal places and final answers to 2 decimal places.) b. Compute
the 90% confidence interval for μ if x− and s2 were obtained from...
Consider a normal population with an unknown population standard deviation. A random sample results in x−...
Consider a normal population with an unknown population standard
deviation. A random sample results in x− = 52.15 and s2 = 21.16.
[You may find it useful to reference the t table.] a. Compute the
95% confidence interval for μ if x− and s2 were obtained from a
sample of 19 observations. (Round intermediate calculations to at
least 4 decimal places. Round "t" value to 3 decimal places and
final answers to 2 decimal places.) b. Compute the 95% confidence...
Consider the normal population with an unknown population standard deviation. A random sample results in xbar=...
Consider the normal population with an unknown population
standard deviation. A random sample results in xbar= 64.54 and
s^2=46.24
a) construct the 90% confidence interval for mu if xbar and s^2
were obtained from a sample of 23 observations( round intermediate
calculations to at least 4 decimal places. Sample mean and sample
standard deviation to 2 decimal places and t value to 3 decimals
and final answer to 2 decimals)
b) construct the 90% confidence interval for mu if xbar...
Exercise 8-19 Algo Consider a normal population with an unknown population standard deviation. A random sample...
Exercise 8-19 Algo
Consider a normal population with an unknown population standard
deviation. A random sample results in x−x− = 43.92 and
s2 = 17.64. [You may find it useful to
reference the t table.]
a. Compute the 95% confidence interval for
μ if x−x− and s2 were obtained from a
sample of 26 observations. (Round intermediate calculations
to at least 4 decimal places. Round "t" value to 3 decimal
places and final answers to 2 decimal places.)
CONFIDENCE INTERVAL...
An independent random sample is selected from an approximately normal population with an unknown standard deviation....
An independent random sample is selected from an approximately
normal population with an unknown standard deviation. Find the
p-value for the given set of hypotheses and T test statistic. Also
determine if the null hypothesis would be rejected at alpha =
0.05.
a. HA : mu > 0, n = 11, t = 1.91
b. HA: mu < 0, n = 17, t = -3.45
A random sample of 15 items is drawn from a population whose standard deviation is unknown....
A random sample of 15 items is drawn from a population whose
standard deviation is unknown. The sample mean is x¯ = 760 and the
sample standard deviation is s = 20. Use Appendix D to find the
values of Student’s t.
(a) Construct an interval estimate of μ with 99% confidence.
(Round your answers to 3 decimal places.)
The 99% confidence interval is from _____ to ______
(b) Construct an interval estimate of μ with 99% confidence,
assuming that...
Suppose a random sample of 25 is drawn from a population whose standard deviation is unknown....
Suppose a random sample of 25 is drawn from a population whose
standard deviation is unknown. If the sample mean is 125 and the
sample standard deviation is 10, the 90% confidence interval to
estimate the population mean is between
A random sample of 20 items is drawn from a population whose standard deviation is unknown....
A random sample of 20 items is drawn from a population whose
standard deviation is unknown. The sample mean is x¯x¯ = 930 and
the sample standard deviation is s = 5. Use Appendix D to
find the values of Student’s t.
(a) Construct an interval estimate of μ
with 98% confidence. (Round your answers to 3 decimal
places.)
The 98% confidence interval is from to
(b) Construct an interval estimate of μ
with 98% confidence, assuming that s =...
A random sample of 28 items is drawn from a population whose standard deviation is unknown....
A random sample of 28 items is drawn from a population whose
standard deviation is unknown. The sample mean is x⎯⎯x¯ = 790 and
the sample standard deviation is s = 15. Use Appendix D to
find the values of Student’s t.
(a)
Construct an interval estimate of μ with 99% confidence.
(Round your answers to 3 decimal places.)
The 99% confidence
interval is from to
(b)
Construct an interval estimate of μ with 99% confidence,
assuming that s = 30....
A random sample of 14 items is drawn from a population whose standard deviation is unknown....
A random sample of 14 items is drawn from a population whose
standard deviation is unknown. The sample mean is x¯ = 780 and the
sample standard deviation is s = 5. Use Appendix D to find the
values of Student’s t.
(a) Construct an interval estimate of μ with 98% confidence.
(Round your answers to 3 decimal places.) The 98% confidence
interval is from _ to _
(b) Construct an interval estimate of μ with 98% confidence,
assuming that...
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