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?
The mean and standard deviation of these scores are 23.0 and 5.0 respectively. The test was administered to 100 students. What is the T-score equivalent to the raw-score 13?
A researcher has a series of Likert-scale items and a measure of frequency of absenteeism. He uses each of the Likert-scaled items in a separate bivariate correlation with absenteeism without testing for the assumptions of linear relationships. Is th..
A simple random sample of 50 speeds (in mph) is obtained from cars traveling on a section of I-10 through Tallahassee. The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the ..
Proportion of out-of-tolerance items is greater than 0.02, the robot will be overhauled. Otherwise it will be allowed to continue operating. What is the probability that a satisfactory robot will be overhauled unnecessarily?
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
Total housing costs as a percent of monthly income, five years ago and now. The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
Based on the earnings below, is there sufficient evidence to conclude, at the 99% level of confidence, that one of these divisions is more profitable than the others? Calculate the mean square for factor, and the mean square for error.
the life time t of a durable substance is an exponential distributed ramdom varialble with average 1.5 year
suppose the amount of cosmic radiation a person is exposed to when flying across the country is a random variable
a testing organization reported that 5 of their scores are under 450 while 40 of their scores exceed 1085. assume that
If two detection systems are installed in the same area and operate independently, what is the probability that at least one of the systems will detect the attack?
a new operating system is installed at every workstation at a large company. the claim of the operating system
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