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A number of minor automobile accidents occur at various high-risk intersections. A study was done. Eight intersections were chosen at random. The number of minor accidents during a 6-month period before and after the modifications were:
Number of accidents
A B C D E F G H
Before modification 5 7 6 4 8 9 8 10
After modification 3 7 7 0 4 6 8 2
At the 0.01 significance level is it reasonable to conclude that the modification reduced the number of traffic accidents?
Compute the z score for the data company. Considering the altman model, comment on the likelihood that this firm will experience financial failures.
A researcher used stepwise regression to create regression models to predict Birth-Rate (births per1000) using five predictors:
Evaluate probability values using normal distribution and How many students earned more than $36,000? _______
For one of the first statistics exam, the coefficient of determination between hours studied and the grade earned was 80 percent. The standard error of estimate was 10.
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. Evaluate the P-value
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
Develop a 90 percent confidence interval for the proportion of applicants that fail the test. (Round your answers to 2 decimal places.)
Having a difficult time finding a health care article that pertains to correlation statistical procedures. I am not even sure what that means.
The final examination of a course requires an essay. The number of pages from a sample of 25 students were collected. The data are:
A running coach wanted to see whether runners ran faster after eating spaghetti the night before. A group of six runners was randomly chosen for this study.
Critically illustrate out the aim and obejectives of factor analysis? Critically illustrate out the aim and obejectives of Cluster analysis? Critically illustrate out the aim and obejectives of Multidimensional analysis?
Mauricio Cruz, a wine merchant for Cruz's Spirits Emporium, wants to determine if the average price of imported wine is less than the average price of domestic wine.
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