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Crab Claws. Reconsider the data on claw closing force and claw size for three species of crabs, shown in Exercise 7.22. Display 10.18 shows output from the least squares fit to the separate lines model for the regression of log force on log height. The regression model for log force was !flforce j lheight, SPECIESgD ?0 C ?1lheight C ?2lb C ?3cp C ?4.lheight x lb/ C ?5.lheight x cp/; where lheight represents log height, lb represents an indicator variable for the second species, and cp represents an indicator variable for the third species. The sample size was 38.
(a) How many degrees of freedom are there in the estimate of a?
(b) What is the p-value for the test of the hypothesis that the slope in the regression of log force on log height is the same for species 2 as it is for species 1?
(c) What is a 95% confidence interval for the amount by which the slope for species 3 exceeds the slope for species 1?
Connie's Apparel was one of Flashner's clients. Connie's Apparel made a profit last year. What is the probability that it was given an original rating of poor?
Find the probability that a customer is served within the first 2 minutes.
the national sporting goods association nsga conducted a survey of the ages of individuals that purchased skateboarding
research has shown that 80 of patinets with a particular chronic condition improve as a result of surgery. assuming
of 1000 randomly selected cases of lung cancer 823 resulted in death. let p be the proportion of deaths among all lung
College is 0.74. A random sample of 280 high school seniors is surveyed. Describe the distribution of the number of students in the sample of 289 that will not attend college.
compute the percentage of variance explained by the treatment effects . treatments a b c dss 24 ss 14 ss 26 ss
Find a 99% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.)
For binomial distribution among given values for n as well as p state whereas or not it is suitable to use normal distribution as an approximation.
Based on data from a car bumper sticker study, when a car is randomly selected, the number of bumber stickers and corresponding probabilities are shown below.
Compare the two distributions graphically, and then use the two-sample t test to compare the average SATM scores of males and females.
the strength of ones immune system can be evaluated in several ways. one of the most popular methods involves measuring
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