Question

A sample of 64 observations is taken from a normal population known to have a standard deviation of 13.7. The sample mean is 47.9. Calculate the test statistic to evaluate the hypothesis µ=46. Enter your answer to 2 decimal places.

A sample of 20 observations is taken from a normal population known to have a standard deviation of 17.3. The sample mean is 47.2. Calculate the test statistic to evaluate the hypothesis µ≤48. Enter your answer to 2 decimal places.

A sample of 20 observations is taken from a normal population known to have a standard deviation of 17.3. The sample mean is 47.2. Calculate the test statistic to evaluate the hypothesis µ≤48. Enter your answer to 2 decimal places.

Given the following null hypothesis H0: µ≤24.

A sample of 7 observations is taken from a normal population. The sample mean is 17.4 and the standard deviation 7.12. Calculate the test statistic to evaluate the hypothesis. Enter your answer to 2 decimal places.

Answer #1

a
sample of 49 observations is taken from a normal population with a
standard deviation of 10. The sample mean is 55. Determine the 99%
confidence interval for the population mean. ( round you answers 2
decimal places)

A sample of 69 observations is selected from one population with
a population standard deviation of 0.79. The sample mean is 2.69. A
sample of 48 observations is selected from a second population with
a population standard deviation of 0.67. The sample mean is 2.61.
Conduct the following test of hypothesis using the 0.05
significance level:
H0: μ1 – μ2≤ 0
H1: μ1 – μ2 > 0
a. State the decision rule. (Round the
final answer to 2 decimal places.)...

A sample of 45 observations is selected from a normal
population. The sample mean is 27, and the population standard
deviation is 6. Conduct the following test of hypothesis using the
0.05 significance level. H0: μ ≤ 26 H1: μ > 26
What is the decision rule? (Round your answer to 2
decimal places.)
What is the value of the test statistic? (Round your
answer to 2 decimal places.)
What is the p-value? (Round your answer to 4
decimal places.)

Exercise 8-2 A sample of 43 observations is taken from a normal
population with a standard deviation of 24. The sample mean is 43.
Determine the 80% confidence interval for the population mean.
(Round the final answers to 3 decimal places.) Confidence interval
for the population mean is and .
statistics

A sample of 10 observations is selected from a normal population
for which the population standard deviation is known to be 4. The
sample mean is 24. (Round your answers to 3 decimal
places.)
(a)
The standard error of the mean is .
(c)
The 99 percent confidence interval for the population mean is
between ___ and ___.

A sample of 49 observations is selected from a normal
population. The sample mean is 21, and the population standard
deviation is 4. Conduct the following test of hypothesis using the
0.05 significance level.
H0: μ ≤ 20
H1: μ > 20
Is this a one- or two-tailed test?
What is the decision rule? (Round your answer to 2
decimal places.)
What is the value of the test statistic? (Round your
answer to 2 decimal places.)
What is your decision...

A sample of 37 observations is selected from a normal
population. The sample mean is 25, and the population standard
deviation is 5. Conduct the following test of hypothesis using the
.05 significance level. H0 : μ ≤ 24 H1 : μ > 24 (a) Is this a
one- or two-tailed test? "One-tailed"-the alternate hypothesis is
greater than direction. "Two-tailed"-the alternate hypothesis is
different from direction. (b) What is the decision rule? (Round
your answer to 2 decimal places.) H0,when...

A random sample of 11 observations was taken from a normal
population. The sample mean and standard deviation are xbar= 74.5
and s= 9. Can we infer at the 5% significance level that the
population mean is greater than 70?
I already found the test statistic (1.66) but I’m at a loss for
how to find the p-value.

A sample of 30 observations is selected from a normal
population. The sample mean is 21, and the population standard
deviation is 6. Conduct the following test of hypothesis using the
0.05 significance level.
H0: μ ≤ 20
H1: μ > 20
Is this a one- or two-tailed test?
"One-tailed"—the alternate hypothesis is greater than
direction.
"Two-tailed"—the alternate hypothesis is different from
direction.
What is the decision rule? (Round your answer to 2
decimal places.)
What is the value of...

A sample of 235 observations is selected from a normal
population with a population standard deviation of 25. The sample
mean is 20.
Determine the standard error of the mean. (Round your
answer to 3 decimal places.)
Determine the 90% confidence interval for the population mean.
(Use z Distribution Table.) (Round your answers to
3 decimal places.)

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