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A local judge has been allowing some individuals convicted of "driving under the influence" to work in a hospital emergency room as an alternative to fines and other penalties. A random sample of offenders has been drawn. Do participants in this program have lower rates of recidivism for this offense?
a. Is there a statistically significant relationship between these variables?
b. Compute column percentages to determine the pattern of the relationship. Which group is more likely to be rearrested for driving under the influence?
Using Theorem 3.15 show that PC correlation loadings extracted from a covariance matrix are identical to those from a correlation matrix if the variances of the variables are equal
suppose you want to sample the music of a band you havent heard before. youre given 5 cds each with 12 tracks. youll
Assuming a population standard deviation of 10.0 minutes and a simple random sample of 30 newspaper readers in the 65-or-over age group, what is the probability that members of this group will average at least 35 minutes reading their next newspap..
Carry out an overall test to determine if there is significant evidence of a difference among A; B and C, at the significance level 1%.
How many classes would you suggest? What is the most suitable class interval? What is the lower limit of the initial class? Create the frequency distribution. Describe the profile of the distribution.
Estimate with 90% confidence the mean number of weeks out of town, assuming that the population is normally distributed with a standard deviation of 6 weeks.
(a) Predict her salary for Year 25 using the least-squares regression equation constructed to predict salary from year.
Construct a probability distribution for Y.- What is the probability that at least one physician attended a Canadian medical school?
Teaching Sociology (July 1995) developed a model for i the professional socialization of graduate students working toward their doctorate. One of the dependent variables modeled was professional confidence.
Now fit the model y = b0 + b2X2 + b2X4+ e. If we define this model as the "reduced model" and the model in part (a) as the "full model", what are the null and alternative hypotheses that will be tested by the F-test corresponding to the ANOVA whos..
Based on the various stepwise approaches and "best-subsets" approaches for selecting an excellent (if not optimal) fitted multiple regression model, which one approach would you select if you had to explain to a client what your chosen model is an..
The average number of typos on one page of a manuscript is 8. What is the probability that 4 to 6 type appear on 2 pages of the manuscript? Imagine Poisson distribution.
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