Question

Studies show that massage therapy has a variety of health benefits and it is not too expensive. A sample of 11 typical one-hour massage therapy sessions showed an average charge of $58. The population standard deviation for a one-hour session is $4.95.

**a.** What assumptions about the population should
we be willing to make if a margin of error is desired?

**b.** Using 90% confidence, what is the margin of
error (to 2 decimals)?

**c.** Using 95% confidence, what is the margin of
error (to 2 decimals)?

Answer #1

a)

The data should be drawn from a normal distribution or it is a
large sample (need

to check that n ≥ 30 ).

The data must be reasonably random.

b)

sample standard deviation, σ = 4.95

sample size, n = 11

Given CI level is 90%, hence α = 1 - 0.9 = 0.1

α/2 = 0.1/2 = 0.05, Zc = Z(α/2) = 1.64

ME = zc * σ/sqrt(n)

ME = 1.64 * 4.95/sqrt(11)

ME = 2.45

c)

Given CI level is 95%, hence α = 1 - 0.95 = 0.05

α/2 = 0.05/2 = 0.025, Zc = Z(α/2) = 1.96

ME = zc * σ/sqrt(n)

ME = 1.96 * 4.95/sqrt(11)

ME = 2.93

Studies show that massage therapy has a variety of health
benefits and it is not too expensive. A sample of
11 typical one-hour massage therapy sessions
showed an average charge of $61. The population
standard deviation for a one-hour session is =
$5.3 .
a. What assumptions about the population should
we be willing to make if a margin of error is desired?
- Select your answer -The population has uniform distribution,
The population is at least approximately normal is...

Studies show that massage therapy has a variety of health benefits
and it is not too expensive. A sample of 10 typical one-hour
massage therapy sessions showed an average charge of $61. The
population standard deviation for a one hour session is s= $5.
a. using 90% confidence, what is the margin of error (to 2
decimals?)
b. using 95% confidence, what is the margin of error (to 2
decimals?)

Studies show that massage therapy has a variety of health
benefits. A sample of 35 typical one-hour massage therapy sessions
showed an average charge of $60. The population standard deviation
for a one-hour session is $5.42. Estimate with 91% confidence the
average charge of all one-hour massage therapy sessions.
We are 91% confident that the (Click to
select)populationsample (Click to select)standard
deviationmeanproportion charge of (Click to
select)all35 one-hour massage therapy sessions is
between and dollars.

Studies show that massage therapy has a variety of health
benefits. A sample of 41 typical one-hour massage therapy sessions
showed an average charge of $65. The population standard deviation
for a one-hour session is $5.54. Estimate with 97% confidence the
average charge of all one-hour massage therapy
sessions. (Round to 2 decimal
places.)
Complete the following sentence to provide an interpretation of
the confidence interval in the context of the problem:
We are 97% confident that the (Click to
select)samplepopulation (Click to...

You may need to use the appropriate appendix table or technology to
answer this question.
Studies show that massage therapy has a variety of health benefits
and it is not too expensive. A sample of 11 typical one-hour massage therapy
sessions showed an average charge of $51. The population standard
deviation for a one-hour session is
σ = $7.5.
(a)
What assumptions about the population should we be willing to make
if a margin of error is desired?
We should...

Population Standard Deviation
5.0000
Sample Size
11
Sample Mean
54.9091
Confidence Interval
Confidence Coefficient
0.98
Lower Limit
Upper Limit
Hypothesis Test
Hypothesized Value
50
Test Statistic
P-value (Lower Tail)
P-value (Upper Tail)
P-value (Two Tail)
0.0012
Sample Size
11
Sample Mean
54.9091
Sample Standard
Deviation
5.5759
Confidence Interval
Confidence Coefficient
0.98
Lower Limit
Upper Limit
Hypothesis Test
Hypothesized Value
50
Test Statistic
P-value (Lower Tail)
P-value (Upper Tail)
P-value (Two Tail)
0.0154
Studies show that massage therapy has a variety...

Total plasma volume is important in determining the required
plasma component in blood replacement therapy for a person
undergoing surgery. Plasma volume is influenced by the overall
health and physical activity of an individual. Suppose that a
random sample of 43 male firefighters are tested and that they have
a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma
per kilogram body weight). Assume that σ = 7.70 ml/kg for the
distribution of blood plasma.
(b) What conditions...

What role could the governance of ethics have played
if it had been in existence in the organization? Assess the
leadership of Enron from an ethical perspective.
THE FALL OF ENRON: A STAKEHOLDER FAILURE
Once upon a time, there was a gleaming headquarters
office tower in Houston, with a giant tilted "£"' in front, slowly
revolving in the Texas sun. The Enron Corporation, which once
ranked among the top Fortune 500 companies, collapsed in 2001 under
a mountain of debt...

Discuss ethical issues that can be identified in this
case and the mode of managing ethics Enron finds itself in this
case. How would you describe the ethical culture and levels of
trust at Enron? Provide reasons for your assessment.
THE FALL OF ENRON: A STAKEHOLDER FAILURE
Once upon a time, there was a gleaming headquarters
office tower in Houston, with a giant tilted "£"' in front, slowly
revolving in the Texas sun. The Enron Corporation, which once
ranked among...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 5 minutes ago

asked 9 minutes ago

asked 12 minutes ago

asked 19 minutes ago

asked 22 minutes ago

asked 23 minutes ago

asked 33 minutes ago

asked 33 minutes ago

asked 36 minutes ago

asked 44 minutes ago

asked 56 minutes ago