![subject](/tpl/images/cats/mat.png)
Mathematics, 18.01.2021 14:00 Senica
An automotive insurance company wants to predict which filed stolen vehicle claims are fraudulent, based on the mean number of claims submitted per year by the policy holder and whether the policy is a new policy, that is, is one year old or less (coded as 1 = yes, 0 = no). Data from a random sample of 98 automotive insurance claims, organized and stored in show that 49 are fraudulent (coded as 1) and 49 are not (coded as 0). (Data extracted from A. Gepp et al., "A Comparative Analysis of Decision Trees vis-a-vis Other Computational Data Mining Techniques in Automotive Insurance Fraud Detection, " Journal of Data Science, 10 (2012), pp. 537-561.)
a. Develop a logistic regression model to predict the probability of a fraudulent claim, based on the number of claims submitted per year by the policy holder and whether the policy is new.
b. Explain the meaning of the regression coefficients in the model in (a).
c. Predict the probability of a fraudulent claim given that the policy holder has submitted a mean of one claim per year and holds a new policy.
d. At the 0.05 level of significance, is there evidence that a logistic regression model that uses the mean number of claims submitted per year by the policy holder and whether the policy is new to predict the probability of a fraudulent claim is a good fitting model?
e. At the 0.05 level of significance, is there evidence that the mean number of claims submitted per year by the policy holder and whether the policy is new each makes a significant contribution to the logistic model?
f. Develop a logistic regression model that includes only the number of claims submitted per year by the policy holder to predict the probability of a fraudulent claim.
g. Develop a logistic regression model that includes only whether the policy is new to predict a fraudulent claim.
h. Compare the models in (a), (f). and (g). Evaluate the differences among the models.
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:30
Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 00:00
Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.
Answers: 1
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 03:30
On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.
Answers: 3
You know the right answer?
An automotive insurance company wants to predict which filed stolen vehicle claims are fraudulent, b...
Questions
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 15.06.2021 07:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 15.06.2021 07:50
![question](/tpl/images/cats/en.png)
English, 15.06.2021 07:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 15.06.2021 07:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 15.06.2021 07:50
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 15.06.2021 07:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 15.06.2021 07:50
![question](/tpl/images/cats/mat.png)
Mathematics, 15.06.2021 07:50
![question](/tpl/images/cats/mat.png)
Mathematics, 15.06.2021 07:50
![question](/tpl/images/cats/mat.png)
Mathematics, 15.06.2021 07:50
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 15.06.2021 08:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 15.06.2021 08:00
![question](/tpl/images/cats/istoriya.png)
History, 15.06.2021 08:00