Question

In: Statistics and Probability

We’re interested in studying the effect of physician encouragement on a smoker’s decision to quit. A...

We’re interested in studying the effect of physician encouragement on a smoker’s decision to quit. A study was conducted where an SRS of 114 smokers were, during routine exams, told about the hazards of smoking and encouraged to quit by the examining physician. A different SRS of 96 smokers were given no advice pertaining to smoking during their routine examination. Of the smokers who received physician encouragement, 11 quit. Of the smokers who received no physician encouragement, 7 quit. Use this information to answer the following.

(a) Find and interpret a 95% confidence interval for the difference in true proportions of quitting smoking between those who receive encouragement to quit from their physicians and those who do not. Check that the necessary conditions are met.

(b) Check the conditions required to perform a hypothesis test for this data to test if there is a difference in the proportions of quitters. Using your answer to part (a), make a formal conclusion. At what level of significance can you make this conclusion?

Solutions

Expert Solution


orchestra answered 2 years ago
Next > < Previous

Related Solutions

A researcher is interested in studying the effect that the amount of fat in the diet...
A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women. The researcher used three different treatment levels for the diet and two levels for the exercise. The results of the acuity test for the subjects in the different treatment levels are shown below. Diet Exercise <30% fat 30% - 60% fat >60% fat <60 minutes 4 3 2 4 1 2 2...
A researcher is interested in studying the effect that the amount of fat in the diet...
A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women. The researcher used three different treatment levels for the diet and two levels for the exercise. The results of the acuity test for the subjects in the different treatment levels are shown below. Diet Exercise <30% fat 30% - 60% fat >60% fat <60 minutes 4 3 2 4 1 2 2...
A researcher is interested in studying the effect that the amount of fat in the diet...
A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women. The researcher used three different treatment levels for the diet and two levels for the exercise. The results of the acuity test for the subjects in the different treatment levels are shown below. Diet Exercise <30% fat 30% - 60% fat >60% fat <60 minutes 4 3 2 4 1 2 2...
You are interested in studying the effect of laptops in class on students’ performance. At the...
You are interested in studying the effect of laptops in class on students’ performance. At the beginning of the quarter, you randomly assign your 250 students to sit on either the left half or the right half of the lecture hall. Students on the left half are told to bring laptops to class and to take notes on their laptops. Students who sit on the right side of the room are required to write notes on paper. At the end...
a researcher at the univeristy of vermont was interested in studying the relationship between attorneys' decision...
a researcher at the univeristy of vermont was interested in studying the relationship between attorneys' decision to prosecute cases and victims' credibility. she collected data on 4205 cases, her two variables were victims' credibility(coded as 0=low, 1=medium, 2=high) and case prosecuted(coded as 0=no, 1=yes). Of the 2713 cases prosecutes , in 1025 cases the victim had high credibility, in 790 of the cases the victim had medium credibility and in 989 cases the victim had low credibility . Of the...
MUST USE SPSS AND POST RESULTS. A researcher is interested in studying the effect that the...
MUST USE SPSS AND POST RESULTS. A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women. The researcher used three different treatment levels for the diet and two levels for the exercise. The results of the acuity test for the subjects in the different treatment levels are shown below. Diet Exercise <30% fat 30% - 60% fat >60% fat <60 minutes 4...
To study of effect of physician participation in administrative decision making in hospitals, a random sample...
To study of effect of physician participation in administrative decision making in hospitals, a random sample of 200 physicians were drawn from different hospitals in Arkansas. Each physician was asked whether he/she generally approved of the administrative decisions made within the hospital and whether they had active participation in the decision process. The results of the interviews are shown in table below. To examine the association between physician’s approval status of decision and their participation status in decision making, a...
From univariate to bivariate Suppose you are interested in studying the effect of education on wages....
From univariate to bivariate Suppose you are interested in studying the effect of education on wages. You propose the following regression of annual salary on years of education and work experience: wage=β0 + β1 educ + β2exper + u where wage = annual salary educ = years of formal education exper = work experience u = error term In a simple regression analysis with educ as the only explanatory variable, the effects of other factors, such as exper, are ....
1.) When we’re studying an individual firm’s production or costs (not the behavior of a market),...
1.) When we’re studying an individual firm’s production or costs (not the behavior of a market), how do we define the short run? What do we hold fixed in the short run when we’re studying a firm’s production and costs? a. Suppose we’re analyzing the behavior of a firm’s costs in the short run. Given that we’re looking at the short run, what do we know about the firm’s marginal cost and average total cost? Briefly explain everything you can...
A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women
A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women. The researcher used three different treatment levels for the diet and two levels for the exercise. The results of the acuity test for the subjects in the different treatment levels are shown below.DietExercise<30% fat30% - 60% fat>60% fat<60 minutes43241222242233160 minutes685or more587475485566Perform a Two-way analysis of variance (ANOVA) and report the results using...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT