A Gallup Poll asked a sample of Canadian adults if they thought the law should allow doctors to end the life of a patient who is in great pain and near death if the patient makes a request in writing. The poll included 270 people in Quebec, 221 of whom agreed that doctor assisted suicide should be allowed.

(a) What is the margin of error of the large-sample 95% confidence interval for the proportion of all Quebec adults who would allow doctor assisted suicide?

(b) How large a sample is needed to get the common +(line underneath +) 3 percentage point margin of error?

Solution Summary

Step by step method for testing the hypothesis under 5 step approach is discussed here.

A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coined biased towards heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.

The manufacturer of a new antidepressant claims that, among all people with depression who use the drug, the proportion of people who find relief from depression is at least 80%. A random sample of 235 patients who use this new drug is selected, and 184 of them find relief from depression. Based on these data, can we reject th

Consider the following hypothesis test:
H0: p = .20
Ha: p (does not equal) .20
A sample of 400 provided a sample proportion beta = 0.175.
a. Compute the value of the test statistic.
b. What is the p-value?
c. At alpha = 0.05, what is you conclusion?
d. What is the rejection rule using the critical value? What is y

A recent magazine article indicated that 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1006 Chevrolet owners and found that 490 said that they would buy another Chevrolet. Does this indicate that the popul

A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who lives in CA and finds that the number who exercises regularly is 31 out of 120.
a. What is X2 obt?
b. What is the df

66% of students at a university live on campus. A random sample found that 20 of 40 male students and 40 of 50 of female students lived on campus. At the .05 level of significance, is there sufficient evidence to conclude that a difference exists between the proportion of male students who live on campus and the proportion of

Hypothesis testing: Please help me with the sample problem 3 (one attachment page 5).
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A claim was made that the proportion of drowning deaths in children attributable to beaches is more than 0.25 and the sample statistics include n=615 drowning deaths of children with 30% attributable to beaches. What is the value of the test statistic z?

Suppose that 50% of all adult Americans believe the federal budget deficits at recent levels cause long-term harm to the nations's ecomony. What is the probability that more than 58% of a random sample of 250 adults Americans would hold this belief?
If the sample of 250 was made up of adults randomly selected from each of

Workers Bosses
N1=436 N2=121
X1=192 X2=40
Assume that you plan to use a significance level of a=.05 to test the claim that P1 = P2. Use the given sample sizes in numbers of success to find p -value.