Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The following data show the number of fruit fly killed at varying concentrations of nicotine.
The number of ies killed in n exposures can be assumed to follow a binomial distribution
(from Hand et al [2]).
(a) Fit both logistic and probit models, modelling proportion killed as a function of nicotine concentration. Are there any obvious differences in the fit of these models?
(b) Plot the observed proportions killed and the two fitted models on the same plot.
Comment on the fit of the models and any differences between models.
(c) Using the models in (a), estimate the nicotine concentration that would kill 50% of flies. Also estimate the dose hat would kill 90% of flies.
(d) Often the experimental factor X is replaced by ln(X) in these quantal assay experiments. Repeat (a) using ln(X) and comment on the fit of these models.
(e) What issues need to be considered when deciding which single model is 'best' between the four models (i.e. the two in (a) and two in (c))? Are any of the four models obviously superior in this example?
bob a manufacturing plant manager is inspecting the diameters of ball bearings produced by a suspected malfunctioning
The 95% prediction interval for a new patient with a 2-day cholesterol level of 220 is
The state of Texas college admission board has set a standard for automatic acceptances to any university at top 10% of any graduating class will be allowed to attend any university in the state.
Graph the p.d.f and show that the probability of the part failing in the first 200 weeks is 1/8
A retailer finds that the demand for a very popular board game averages 100 per week with a standard deviation of 20. If the seller wishes to have adequate stock 95% of the time.
Pepsi wanted to test to determine if the males preferred Pepsi more than the females. (a) PConduct the appropriate test and describe the results (ick your own alpha value)
In a sample of 10 workers, what is the probability that exactly three workers take the public transport daily? [Hint: It is a Binomial Distribution Problem.]
in study hall 3 of the 16 girls have red hair and 2 of the 15 boys have red hair. what is the probability of selecting
A researcher wishes to construct a 95% confidence interval for a population mean. She selects a simple random sample of size n=20 from the population.
Safe T cigarettes claim that their product has "low tar." Government standards are that this claim is invalid if there are more than 13.5mg tar per cigarette.
In random samples of 25 from each of two normal populations, we found the following statistics: Estimate the difference between the two populations means with 95% confidence.
the shape of the distribution of the time required to get an oil change at a 10 minute oil change facility is unknown.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd