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You are interested in studying the relationship between cigarette-smoking habits in married couples. Suppose that the probability of the wife being a smoker is 0.4 whereas the probability of the husband being a smoker is 0.5. Also, suppose that if the husband is a smoker, then the probability that the wife is a smoker is 0.6; whereas if the husband is not a smoker, then the probability that the wife is a smoker is 0.2. Use these data to answer the questions below.
a. What is the probability that the husband and the wife smoke?
b. What is the probability that the husband smokes and the wife does not smoke?
the desired percentage of sio2nbspin a certain type of aluminous cement is 5.5. to test whether the true average
What is the probability that the fiber will break at 1,500 cycles? What is the probability that the fiber will break at 2,500 cycles?
The values of y and x are inversely related, and 64% of the variation in y is explained by the regression equation. What is the coefficient of correlation?
the incidence of a certain disease in the population is estimated to be 1.0 . that is the probability that a randomly
Create a two-way table to summarize these data. Notice that the two variables are categorical, as can be seen from the raw data.
For these 222 students, conduct a X2 test of the hypothesis that the population proportions of right-to-wrong and wrong-to-right changes are equal
As his estimate of tree size, the specialist measures diameter at breast height (dbh, in inches). He records the following dbh for canopy red oak in two stands
Recognize and explain potential threats (up to 3) to external validity.
Mr. Kishore wants to determine the average size required complete job with which he is concerned. As per the last studies, the population
a. Use software to find the mean and standard deviation. b. Report the z-score for the shortest film, about the camel.
Computing from a large sample, one finds the 95% confidence interval for 956; to be {6.8, 14.2}. Based on this information alone, determine the 90% confidence interval for 956
Based on the data and the assumption of a bell-shaped distribution, what score should be used for the two cutoffs?
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