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1) A researcher studying correctional treatment on 192 sex offenders composed of 10 females and 182 males finds that 11 males along with 1 female had reoffended. He then calculates the percentages and finds that 10% of females and 6% of males had reoffended and concludes that female sex offenders were more likely to reoffend than male sex offenders. What is wrong with his conclusion?
2) A researcher evaluating a gun training program in a large American city found that rapes dropped by 90% in the year following the training. Researchers looking at the same data but expanding the time frame to include 5 years before the training and 5 years after the training found that the rape rate in the same city had fluctuated wildly over that decade including zero rapes being recorded in the city two years before the gun training was implemented. Thirty years after this research advocates still cite the first study and ignore the second study. What's the moral of this story?
Using the above RSAC and RSPAC, calculate the corresponding krs , krt , kk rs , kk rt k = 1, 2, 3, 4 5, 6, to identify a model describing ηt .Explain your choice of model. Please also provide the new model for STAT S802F - Multivariate and Time Se..
A standard 6-sided die is weighted so that the probabilities of rolling 2,3,4,5 or 6 are equal and the probability of rolling 1 is three times the probability of rolling 2. If the die is thrown twice, what is the probability that the sum of the nu..
a pair of dice is rolled. find the probability of rollinga a sum not more than 4b a sum not less than 10c a sum between
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
A. what is the probability a randomly chosen business customer flying is on a jumbo jet? B. what is the probability a randomly chosen non-business customer is on an ordinary jet?
What are accruals? Provide examples of accruals. Why do accruals require adjusting entries? What types of accounts are debited and credited in an unearned revenue adjusting entry?
Assume the reliability of a product is given by an exponential distribution with a mean of 1 year. How long would it take to achieve a 10% failure rate?
Create a 90% confidence interval for proportion of all kernels that would not pop.
The data shown in Table E6.15 are for 1500 women over 54 years of age. Test to compare the proportions of subjects who consumed less vitamin A (a150,500 IU/ month), cases versus controls; state clearly your null and alternative hypotheses and choi..
A bar chart to illustrate the differences. What type of statistics was shown? What activities did the newspaper use to make the report?
What are the pros and cons of selecting an established theoretical or conceptual model or framework? What are the pros and cons of creating/developing your own?
to determine the median life span of certain species of animal is greater than 7 years a random sample of 22
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