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Table 7.27, from a General Social Survey, relates responses on R = religious service attendance (1 = at most a few times a year, 2 = at least several times a year), P = political views (1 = Liberal, 2 = Moderate, 3 = Conservative), B = birth control availability to teenagers between ages of 14 and 16 (1 = agree, 2 = disagree), S = sexual relations before marriage (1 = wrong only sometimes or not wrong at all, 2 = always or almost always wrong).
a. Find a loglinear model that fits these data well. b. Interpret this model by estimating conditional odds ratios for each pair of variables.c. Consider the logistic model predicting (S) using the other variables as maineffect predictors, without any interaction. Fit the corresponding loglinear model. Does it fit adequately? Interpret the effects of the predictors on the response, and compare to results from (b).d. Draw the independence graph of the loglinear model selected in (a). Remark on conditional independence patterns. For each pair of variables, indicate whether the fitted marginal and conditional associations are identical.
List the eight phases of development of a canal system. Discuss the possible costs incurred by the canal owner, the canal users (shippers), and the surrounding community at each phase of developing this engineering system.
Calculate the expected value and standard deviation of this random variable X by using the probability distribution shown. (b) Describe the shape of this distribution. x P(x) 60 0.40 70 0.30 80 0.20 90 0.10 Chap 7 Remember, all z values should be ..
the freshness and overall quality of milk depend upon the type of packaging used. the manager of a dairy company is
kyle averages 5 finished accounts per day. his standard deviation is 1 account per day and we want to know how many accounts he has to finish in a day to be at his 79.95 percentile
Run an analysis of variance by estimating the missing value. Use a = .05. Make treatment comparisons by using Fisher's least significant difference, with a = .05.
The same survey was mailed to 500 adults aged 25–34 without the gift certificate. There were 65 responses from the first group and 45 from the second group. (a) Perform a two-tailed test comparing the response rates (proportions) at α = .05
If you did not know anything about standard deviation of population from which sample was taken, find out the 95% confidence interval for mean test score.
A machine is set to pump cleanser into a process at the rate of 8 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 7.5 to 10.5 gallons per..
a) Compute a 95% Confidence Interval for the true population proportion of successes. b) Based on this analysis can you conclude that the new system meets the requirement? Explain your conclusion.
1. graph the null hypothesis on a number line.2. determine whether the hypothesis test with the given null and
a survey is taken in which 40 randomly selected respondents aged 25-40 are asked how many biological children they
x is a normally distributed random variable with a standard deviation of 4.00. find the mean of x if 12.71 of the area
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