Question

1. A data set includes data from student evaluations of courses. The summary statistics are n=85, x=3.44, s=0.67. Use a 0.01 significance level to test the claim that the population of student course evaluations has a mean equal to 3.50. Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.

a. determine the test statistic

b. determine the P-value ( round to 3 decimal places)

2. A data set about speed dating includes "like" ratings of male dates made by the female dates. The summary statistics are n=188, x =7.87, s=1.92. Use a 0.05 significance level to test the claim that the population mean of such ratings is less than 8.00. Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.

a. determine the test statistic

b. determine the P-value ( round to 3 decimal places)

3.

In a test of the effectiveness of garlic for lowering
cholesterol, 81 subjects were treated with raw garlic. Cholesterol
levels were measured before and after the treatment. The changes
(before minus after) in their levels of LDL cholesterol (in
mg/dL) have a mean of 0.9

and a standard deviation of 18.2. Use a 0.10 significance level to
test the claim that with garlic treatment, the mean change in LDL
cholesterol is greater than 0. What do the results suggest about
the effectiveness of the garlic treatment? Assume that a simple
random sample has been selected. Identify the null and alternative
hypotheses, test statistic, P-value, and state the final
conclusion that addresses the original claim.

a. determine the test statistic

b. determine the P-value ( round to 3 decimal places)

Answer #1

in problem ( 2 ) p value = 0.177

A data set includes data from student evaluations of courses.
The summary statistics are n=84, xbar =3.42 s=0.56
Use a 0.01 significance level to test the claim that the
population of student course evaluations has a mean equal to
3.50.
Assume that a simple random sample has been selected. Identify
the null and alternative hypotheses, test statistic, P-value, and
state the final conclusion that addresses the original claim.
What are the null and alternative hypotheses?
Determine the test statistic.
Determine...

A data set includes data from student evaluations of courses.
The summary statistics are n=86, x=4.19, s=0.65 Use a 0.05
significance level to test the claim that the population of student
course evaluations has a mean equal to 4.25 Assume that a simple
random sample has been selected. Identify the null and alternative
hypotheses, test statistic, P-value, and state the final
conclusion that addresses the original claim.
Determine the test statistic.
Determine the P-value.
State the final conclusion that addresses...

A data set includes data from student evaluations of courses.
The summary statistics are n equals=92, x equals=4.09, s
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the population of student course evaluations has a mean equal to
4.25. Assume that a simple random sample has been selected.
Identify the null and alternative hypotheses, test statistic,
P-value, and state the final conclusion that addresses the original
claim.
What are the null and alternative hypotheses?
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A data set includes data from student evaluations of courses.
The summary statistics are
n=90,
x=3.32,
s=0.68.
Use a 0.05 significance level to test the claim that the
population of student course evaluations has a mean equal to
3.50.
Assume that a simple random sample has been selected. Identify
the null and alternative hypotheses, test statistic, P-value, and
state the final conclusion that addresses the original claim.
What are the null and alternative hypotheses?
Determine the test statistic.
State the...

A data set includes data from student evaluations of courses.
The summary statistics are n = 84, x (x bar) = 4.16, s = 0.59. Use
a 0.05 significance level to test the claim that the population of
student course evaluations has a mean equal to 4.25. Assume that a
simple random sample has been selected. Identify the null and
alternative hypotheses, test statistic, P-value, and state the
final conclusion that addresses the original claim. Show your work.
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A data set includes data from student evaluations of courses.
The summary statistics are
n=83,
x=3.43,
s=0.55.
Use a
0.01
significance level to test the claim that the population of
student course evaluations has a mean equal to
3.50.
Assume that a simple random sample has been selected. Identify
the null and alternative hypotheses, test statistic, P-value, and
state the final conclusion that addresses the original claim.
Determine the test statistic.
(Round to two decimal places as needed.)
Determine the...

A data set includes data from student evaluations of courses.
The summary statistics are n=95, x=3.86, s=0.67. Use a 0.05
significance level to test the claim that the population of student
course evaluations has a mean equal to 4.00. Assume that a simple
random sample has been selected. Identify the null and alternative
hypotheses, test statistic, P-value, and state the final
conclusion that addresses the original claim. What are the null and
alternative hypotheses?

A data set includes data from student evaluations of courses.
The summary statistics are nequals=8484, x
overbarxequals=3.693.69, sequals=0.660.66. Use a 0.100.10
significance level to test the claim that the population of student
course evaluations has a mean equal to 3.753.75. Assume that a
simple random sample has been selected. Identify the null and
alternative hypotheses, test statistic, P-value, and state the
final conclusion that addresses the original claim.
b) Determine the test statistic.
c)Determine the P-value.
d) State the final...

A data set includes data from student evaluations of courses.
The summary statistics are n=91, x =3.67, s=0.68 Use a 0.01
significance level to test the claim that the population of student
course evaluations has a mean equal to 3.75 , Assume that a simple
random sample has been selected. Identify the null and alternative
hypotheses, test statistic, P-value, and state the final
conclusion that addresses the original claim.

A data set includes data from student evaluations of courses.
The summary statistics are n=86, x bar=3.33, s=0.62. Use a 0.05
significance level to test the claim that the population of student
course evaluations has a mean equal to 3.50. Assume that a simple
random sample has been selected. Identify the null and alternative
hypotheses, test statistic, p-value, and state the final conclusion
that addresses the original claim.

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