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A national survey of 40,000 adults in the US in 1992 found that 26% of adults were current smokers. A similar survey of 37,000 adults in the US in 1966 found that 43% of adults were current smokers. Construct a 95% confidence interval for the difference between proportions of current smokers in 1991 and 1965.
a researcher concerned about the foreign ownership of the retail trade industy in the u.s. conducts a survey of retail
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states. At= .05, is there a difference in the interest rates paid by the two states?
Let W(t) denote a wide sense stationary Gaussian noise process with µW = 0 and power spectral density SW ( f ) = 1. (a) What is RW (τ ), the autocorrelation of W(t)?
you work for the bc lottery corp. your boss asks you for an estimate of the percent of british columbians who have
At the 0.05 level ofsignificance, is there evidence of a significant relationship between the agegroup and where people primarily get their news? If so, explain the relationship.
A 95% confidence interval from an SRS of 30 observations. (a) A 90% confidence interval based on n = 12 observations. S7.1
Do the actual numbers of goals per game follow this distribution? You might want to take several weeks' results toobtain more reliable results.
In the opening sections, we reported the result of an opinion poll of 100 undergraduate chemical engineering students in the United States: 75 of the students prefer "closed-book" exams to "opened-book" ones.
What is the probability that between 10:00 and 10:30 the switchboard will receive more than 9 calls but fewer than 15 calls?
Formulate and LP model for this problem using Excel. Sketch the feasible region for this problem using Excel. Find the optimal solution
assume the distribution of heights among all 15 year old boys is normally distributed with mean 67 and standard
q.nbspnbspstudents in a management science class have just received their grades on the first test. the instructor has
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