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(This continues exercise 1; it is still a hypothetical.) After thinking things over, Dr. Smith still believes that the response schedule is linear: Yi,x = a +bx +δi , the δi being IID N(0, σ2). But she decides that her values fora, b, and σ2 are unrealistic. (They probably are.) She wants to estimate these parameters from data.
(a) Does she need to do an experiment, or can she get by with observational study? (The latter would be much easier to do.)
(b) If she can use observational data, what else would she have to assume, beyond the response schedule?
(c) And, howwould she estimate the parameters from the observational data?
the speed of a runner increased steadily during the first three seconds of a race. her speed at half-second intervals
a study found that the average time it took a person to find a new job was 3.5 months. if a sample of 30 job seekers
Bill heats his house with natural gas. The gas usage is measured in therms (T). In January of 2007 he used 125 therms over 34 days (D) and the average temperature (T) was 49 degrees farenheit.
Choose a variable (such as number of daily admissions at a local theater or number of miles students have to commute daily to get to their college.) Before collecting the data, decide what a likely average might be, then complete the following:
BMI in children is roughtl normally distributed with the mean of 24.5 and standard deviation of 6.2. BMI of 30 or more is considered obese. Determine proportion of children are obese?
The Spanish patients, two men and two women, were elderly and very ill. All four had undergone routine dialysis at the Hospital de la Princesa.
the system is released from rest with no slack in the cable and with the spring unstretched. determine the distance s
Why is a normal distribution called "normal"? Investigate the answer to this question on the internet and share the answer in your own words. Be sure to cite your sources.
a. Find the average length for commercials appearing on this station. b. If a 15-second spot sells for $500, a 30-second spot for $800, and a 60-second spot for $1000, find the average amount paid for commercials appearing on this station. (Hint: ..
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets?
To evaluate the effect of a treatment , a sample of n=9 is obtained from a population with a mean of m=40 and the treatment is administered to the individuals is found to be M-33
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