Question
In: Statistics and Probability
1. In a clinical trial for the effectiveness of a new treatment for the flu, some...
1. In a clinical trial for the effectiveness of a new treatment for the flu, some people were given the new treatment while others received a placebo, Of the 400 people that were given the new treatment, 300 of them saw improvements. Of the 169 people that received the placebo, 120 saw improvements. Use a 0.05 significance level to test the claim that there is no difference in the proportion of people that saw improvements whether or not they receive the new treatment.
(a) Find the null hypothesis, H0 and the alternative hypothesis, H1.
(b) Find the test statistic, z.
(c) Find the critical region.
(d) Determine whether we can reject the null hypothesis or not
Solutions
orchestra answered 2 years agoRelated Solutions
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A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before treatment, 18
subjects had a mean wake time of 103.0 min. After treatment, the
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deviation of 20.7 min. Assume that the 18 sample values appear to
be from a normally distributed population and construct a 95 %
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drug for treating insomnia in older subjects. Before treatment, 15
subjects had a mean wake time of 105.0 min. After treatment, the
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deviation of 24.3 min. Assume that the 15 sample values appear to
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A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in...
A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before
treatment,
2323
subjects had a mean wake time of
100.0100.0
min. After treatment, the
2323
subjects had a mean wake time of
74.674.6
min and a standard deviation of
20.920.9
min. Assume that the
2323
sample values appear to be from a normally distributed
population and construct a
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confidence interval estimate of the mean wake time for a
population with...
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