The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An acupuncturist claims that her treatment can reduce this figure significantly. A random sample of 136 Americans is administered the acupuncturists treatment and 14 report experiencing migraines. a. State Hypotheses to the scenario using the correct symbols.  b.What is the sample proportion? (Round to 2 decimal places) ˆpp^= c. Suppose the P-value is calculated to be 0.0144 What would your decision be for this test using α=α= 0.10? Accept the null, fail to reject the null or reject the null d. Write a conclusion in terms of the acupuncturist's claim. Use the model provided by the instructor. Assume no errors were made.

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The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An acupuncturist claims that her treatment can reduce this figure significantly. A random sample of 136 Americans is administered the acupuncturists treatment and 14 report experiencing migraines.

a. State Hypotheses to the scenario using the correct symbols.

 b.What is the sample proportion? (Round to 2 decimal places) ˆpp^=

c. Suppose the P-value is calculated to be 0.0144

What would your decision be for this test using α=α= 0.10?

Accept the null, fail to reject the null or reject the null

d. Write a conclusion in terms of the acupuncturist's claim. Use the model provided by the instructor. Assume no errors were made.

 

Reject Ho
P < a
Fail to Reject Ho
P > a
Decision
Reason
The results of the sample
data support Ha and reject
Ho
The results of the sample data
do not support Ha and do not
reject H.
Conclusion
Example 1: It's a Boy Genetics Labs claim their procedures improve the chances of a boy
being born. The results for a test of a single population proportion are as follows:
Ho: p = 0.5
Ha:p > 0.5
a = 0.01
P = 0.023
Decision: Since P < a we reject the null hypothesis
Conclusion: The results of the sample data support the claim that It's a Boy Genetics Labs
improve the chances of a boy being born at the 0.01 level of significance.
Example 2: The mean age of graduate students at PC University is claimed to be 30 years.
The results of a test of a single population mean are as follows:
Ho:H = 30
Ha:u + 30
a = 0.05
P = 0.11
Decision: Since P > a we fail to reject the null hypothesis
Conclusion: The results of the sample data do not reject the claim that the mean age of
graduate students at PCU is 30 years at the 0.05 level of significance.
Note: Notice how we always relate our conclusion back to the claim whether it is the null or
alternative. In most cases the claim will be the alternative.
Transcribed Image Text:Reject Ho P < a Fail to Reject Ho P > a Decision Reason The results of the sample data support Ha and reject Ho The results of the sample data do not support Ha and do not reject H. Conclusion Example 1: It's a Boy Genetics Labs claim their procedures improve the chances of a boy being born. The results for a test of a single population proportion are as follows: Ho: p = 0.5 Ha:p > 0.5 a = 0.01 P = 0.023 Decision: Since P < a we reject the null hypothesis Conclusion: The results of the sample data support the claim that It's a Boy Genetics Labs improve the chances of a boy being born at the 0.01 level of significance. Example 2: The mean age of graduate students at PC University is claimed to be 30 years. The results of a test of a single population mean are as follows: Ho:H = 30 Ha:u + 30 a = 0.05 P = 0.11 Decision: Since P > a we fail to reject the null hypothesis Conclusion: The results of the sample data do not reject the claim that the mean age of graduate students at PCU is 30 years at the 0.05 level of significance. Note: Notice how we always relate our conclusion back to the claim whether it is the null or alternative. In most cases the claim will be the alternative.
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