Question
In: Statistics and Probability
A medical researcher maintains that the mean hemoglobin reading of surgical patients is different from 12...
A medical researcher maintains that the mean hemoglobin reading of surgical patients is different from 12 grams per deciliter. He randomly selects nine surgical patients and obtains the following data:
| 8.8 | 12.5 | 10.3 | 12.0 | 14.6 | 9.1 | 9.9 | 13.0 | 14.6 |
- Is this a one or two-tailed test?
- What confidence interval would correspond to a 0.01 level of significance in a hypothesis test?
- Compute the confidence interval and make a decision. Justify your decision.
- Compute the p-value using a t-Test for:
- H0:μ=12H0:μ=12
- H0:μ≠12H0:μ≠12
- How does the confidence interval method compare to the T-test?
Solutions
orchestra answered 1 year agoRelated Solutions
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A medical researcher wishes to try three different techniques to lower the blood pressure of patients...
A medical researcher wishes to try three different techniques to
lower the blood pressure of patients with high blood pressure. The
subjects are randomly selected and assigned to one of three groups.
Group 1 is given medication, Group 2 is given an exercise program,
and Group 3 is assigned a diet program. At the end of six weeks,
each subject's blood pressure is recorded. Find the test statistic
F to test the claim that there is no difference between the...
6. A medical researcher wishes to try three different techniques to lower blood pressure of patients...
6. A medical researcher wishes to try three different techniques
to lower blood pressure of patients with high blood pressure. The
subjects are randomly selected and assigned to one of three groups.
Group 1 is given medication, Group 2 is given an exercise program,
and Group 3 is assigned a diet program. At the end of six weeks,
each subject’s blood pressure is recorded. Alpha=.05
Group 1
Group 2
Group 3
13
8
8
12
5
12
11
2
4...
A researcher selects a sample of 49 participants from a population with a mean of 12...
A researcher selects a sample of 49 participants from a
population with a mean of 12 and a standard deviation of 3.5. What
is the probability of selecting a sample mean that is at least
equal to the population mean? 0.50 equal to the probability of
selecting a sample mean that is at most equal to the population
mean all of the above none of the above
A researcher has collected the blood samples of 30 individuals and found that the mean hemoglobin...
A researcher has collected the blood samples of 30 individuals
and found that the mean hemoglobin concentration for the sample of
individuals is 13.9 grams per deciliter and the standard deviation
is 1.43 grams per deciliter. Calculate a 99.0% confidence interval
for the mean hemoglobin concentration for the population. [1]
(10.22, 17.58) [2] (13.17, 14.63) [3] (13.18, 14.62) [4] (13.23,
14.57)
A researcher has collected the blood samples of 30 individuals and found that the mean hemoglobin...
A researcher has collected the blood samples of 30 individuals
and found that the mean hemoglobin concentration for the sample of
individuals is 13.9 grams per deciliter and the standard deviation
is 1.43 grams per deciliter. Calculate a 99.0% confidence interval
for the mean hemoglobin concentration for the population.
[1] (10.22, 17.58)
[2] (13.17, 14.63)
[3] (13.18, 14.62)
[4] (13.23, 14.57)
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then compute its probability.
(b) Describe in terms of ST and OT the event that a newly
admitted patient will receive surgical treatment but not
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1) A medical researcher wants to investigate the amount of time it takes for patients' headache...
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new prescription painkiller. She plans to use statistical methods
to estimate the mean of the population of relief times. She
believes that the population is normally distributed with a
standard deviation of 22 minutes. How large a sample should she
take to estimate the mean time to within 4 minutes with 96%
confidence?
Sample Size =
2)...
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