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Public Policy and Political Science
The high cost of health care has forced some people to choose between medical treatment and other necessities such as food, heat, or electricity. A recent survey concluded that 43% of America's working-age adults did not see a doctor or access other medical services during the past year because of the cost.63 Following a recent advertising campaign urging adults to seek medical assistance when needed, physicians' groups hope this percentage has decreased. A random sample of 1000 working Americans was obtained, and 380 did not seek medical assistance when needed, because of the cost.
a. Is there any evidence to suggest the proportion of American workers who did not seek medical assistance has decreased? Use a = 0.01.
b. Find the probability of a type II error in this hypothesis test for pa = 0.38; that is, find β (0.38).
c. Find a value of pa such that the probability of a type II error is 0.1; that is, solve β(pa) = 0.1 for pa.
d. Find the sample size necessary such that the probability of a type II error for pa = 0.35 is 0.025; that is, solve β (0.35) = 0.025 for n.
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Likewise, the variance of the demand for the entire three week period is the sum of the individual weekly variances. But be careful! The standard deviation of the demand for the entire 3 week period is not the sum of the individual standard deviat..
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study where a drug was given to 10 patients and a placebo to another group of 10 patients to determine if the drug has an effect on a patient's illness?
for each of the following statements about the chi-square x2 distribution state whether it is true or false and
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