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Common maize rust is a serious disease of sweet corn. Researchers in New York state have developed an action threshold for initiation of fungicide applications based on a regression equation relating maize rust incidence severity of the disease (Phytopathology, Vol.80,1990). In one particular field, data were collected on more than 100 plants of the sweet corn hybrid Jubilee. For each plant, incidence was measured as the percentage of leaves infected (x) and severity was calculated as the log (base 10) of the average number of infections per leaf (y). A simple linear regression analysis of the data produced the following results
a. Interpret the value of
b. Interpret the value of r2.
c. Interpret the value of s.
d. Calculate the value of r and interpret it
e. Use the result, part d, to test the utility of the model. Use α = .05. (Assume n = 100.)
f. Predict the severity of the disease when the incidence of maize rust for a plant is 80%. [Note: Take the antilog (base 10) of to obtain the predicted average number of infections per leaf.]
the discrete random variable x is the number of students that show up for professor smiths office hours on monday
you bought a new set of tires from the manufacturer who just announced a recall because 12 of those tires are
(a) Compute the arithmetic mean of the subscribers' incomes. (b) Compute the modal and median incomes.
The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute.
Analyst computes production cost per unit in each order and averages these to get $50.
In the Florida lottery, six numbers from 1 to 53 must be selected. to win the jackpot, the six numbers must match the draw numbers.
In optimal solution, determine minimum time needed to complete project?
in a sample of 800 people 326 of them were found to have frequent headaches. what is the sample proportion of people
If the probabilities of s1, s2, and s3 are 0.2, 0.4, and 0.4, respectively, then what decision should be made using the expected
Seiko purchases watch stems for their watches in lots of 10,000. Seiko's sampling plan calls for checking 20 stems, and if 3 or fewer stems are defective, the lot is accepted.
a manufacturer of plumbing fixtures has developed a new type of washerless faucet. let p p a randomly selected faucet
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
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