Question
In: Statistics and Probability
A random sample of size 22 from a normal distribution has standard deviation =s50 . Test...
A random sample of size
22
from a normal distribution has standard deviation
=s50
. Test
=:H0σ58
versus
≠:H1σ58
. Use the
=α0.10
level of significance.
Solutions
orchestra answered 1 year agoRelated Solutions
A random sample of size 16 from a normal distribution with known population standard deviation �...
A random sample of size 16 from a normal distribution with known
population standard deviation � = 3.1 yields sample average � =
23.2.
What probability distribution should we use for our sampling
distributions of the means?
a) Normal Distribution
b) T-distribution
c) Binomial Distribution
d) Poisson Distribution
What is the error bound (error) for this sample average for a
90% confidence interval?
What is the 90% confidence interval for the population mean?
A sample of 22 observations is selected from a normal population. The sample standard deviation is...
A sample of 22 observations is selected from a normal
population. The sample standard deviation is 23.00, and the sample
mean is 51.
a. Determine the standard error of the mean. (Round the final
answer to 4 decimal places.)
The standard error of the mean is
b. Determine the 80% confidence interval for the population
mean. (Round the final answers to 2 decimal places.)
The 80% confidence interval for the population mean is between ？
and ？
...
The distribution of results from a cholesterol test has a mean of 180 and a standard deviation of 20. A sample size of 40 is drawn randomly.
The distribution of results from a cholesterol test has a
mean of 180 and a standard deviation of 20. A sample size of 40 is
drawn randomly.Find the sum that is one standard deviation below the mean of the
sums. (Round your answer to two decimal places.)
A sample of 22 observations is selected from a normal population where the population standard deviation...
A sample of 22 observations is selected from a normal population
where the population standard deviation is 26. The sample mean is
68.
a. Determine the standard error of the mean.
(Round the final answer to 3 decimal places.)
The standard error of the mean is .
b. Determine the 80% confidence interval for
the population mean. (Round the z-value to 2
decimal places. Round the final answers to 3 decimal
places.)
The 80% confidence interval for the population mean is...
X has a distribution with mean = 70 and standard deviation = 20. The sample size...
X has a distribution with mean = 70 and standard deviation =
20. The sample size is 16.
Find P(66 < or equal to x bar < or equal to 71)
A sample of size n =52 is drawn from a normal population whose standard deviation is...
A sample of size n =52 is drawn from a normal population whose
standard deviation is σ=7.9. The sample mean is x=43.78
(a) Construct a 80% confidence interval for μ. Round the answer
to at least two decimal places..
(b) If the population were not approximately normal, would the
confidence interval constructed in part (a) be valid? Is the sample
large?
A sample of size =n66 is drawn from a normal population whose standard deviation is =σ8.9....
A sample of size =n66 is drawn from a normal population whose
standard deviation is =σ8.9. The sample mean is =x50.35.
Part 1 of 2 (
a) Construct a 98% confidence interval for μ. Round the answer
to at least two decimal places. A 98% confidence interval for the
mean is <μ<
P(b) If the population were not approximately normal, would the
confidence interval constructed in part (a) be valid? Explain. The
confidence interval constructed in part (a) ▼(Choose one)(would...
We draw a random sample of size 36 from a population with standard deviation 3.2. If...
We draw a random sample of size 36 from a population with
standard deviation 3.2. If the sample mean is 27, what is a 95%
confidence interval for the population mean?
[26.7550, 28.2450]
[25.9547, 28.0453]
[25.8567, 28.1433]
[26.8401, 27.1599]
We draw a random sample of size 36 from a population with standard deviation 3.2. If...
We draw a random sample of size 36 from a population with
standard deviation 3.2. If the sample mean is 27, what is a 95%
confidence interval for the population mean?
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
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