Question

A new flu vaccine was developed to protect elderly people against viral infection during the winter season. In 120 patients, 70 of the patients who were vaccinated. Of the 70 patients, 56 of the patients had no flu symptoms. 50 of the patients who were not vaccinated, 28 patients have no flu symptoms.

a) Determine the confidence interval (CI) at 95% (z*=1.96) level for the probability that a patient had no flu symptoms when a new vaccine is used during the winter season. What is the sample proportion (p̂) of patients with no symptoms when vaccine is used?

b) Carry out a statistical test at the α=0.05 level for whether the probability of vaccinated patients with no flu symptoms is higher than the proportion of people who are not vaccinated. Determine the null and alternative hypothesis. What is the pooled sample proportion (p̂)?

Answer #1

A new flu vaccine was developed to protect elderly people
against viral infection during the winter season. In 120 patients,
70 of the patients who were vaccinated. Of the 70 patients, 56 of
the patients had no flu symptoms. 50 of the patients who were not
vaccinated, 28 patients have no flu symptoms.
Determine the confidence interval (CI) at 95% (z*=1.96) level
for the probability that a patient had no flu symptoms when a new
vaccine is used during the...

In order to test the effectiveness of the Flu vaccine, it was
administered to 600 people who were selected at random. At the end
of the Flu season it was determined that 504 individuals did not
get the Flu. Then the 95% confidence interval for the true
proportion p of individuals who develop immunity is given by0.84 ±
0.05
0.84 ± 0.029
0.84 ± 1.96
0.84 ± 0.196

A drug company is studying the effect of a new drug. In
its clinical trials, the researcher used a significance level of
.01. By using this significance level instead of the more usual
.05, the researcher has
A) Expanded the critical region
B) Increased the critical value
C) Increased the probability of rejecting the Ho
2) When a researcher failed to reject the null
hypothesis
A) The obtained statistical value is larger than the
critical value
B) The obtained statistical...

What tools could AA leaders have used to increase their
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???ALASKA AIRLINES: NAVIGATING CHANGE
In the autumn of 2007, Alaska Airlines executives adjourned at
the end of a long and stressful day in the
midst of a multi-day strategic planning session. Most headed
outside to relax, unwind and enjoy a bonfire
on the shore of Semiahmoo Spit, outside the meeting venue in
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Washington state.
Meanwhile, several members of...

________ client-centered therapy centers on the patient's goals
and ways of solving problems.
Select one:
a. Rogers'
b. Freud's
c. Beck
d. Ellis
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A frequently prescribed drug therapy for managing one's
depression is ____________.
Select one:
a. Adderall
b. Lithium
c. Prozac
d. Thorazine
Question 3
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A major goal of modern inpatient psychiatric treatment is:
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