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Pieces of vulcanite were examined according to porosity and dimensional defects and the results are shown below. Test the hypothesis that the two criteria of classification are independent. Specify alpha.
Porous Nonporous
with defective dimensions 142 331
Without def dimensions 1233 5099
If there is enough evidence to reject the claim of no difference in the ages of the two groups. Use the standard deviations from the samples and the P-value method.
explain clearly and in detail why a person that simultaneously flips 1023 pennies in the air will nevertheless
when 100 students took a test the average score was 77.1. two more students took the test. the sum of their scores was
A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounce. Is there enough evidence to support the consumer's conjecture at a = 0.05? First, identify the alternative and the null hypotheses.
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. At.10 significance level, has there been an increase in selling time?
What are the mean and the standard deviations for the population of produced with this process?
Find a 95 percent confidence interval for the true proportion of all current Bank of America customers who would respond with a 9 or 10.
Generate a 95 % confidence interval for the difference in proportions of patients who report pain relief.
What are the Chi-square results? What are the expected and the observed results that were found? Are they results of the Chi-Square significant? What do the results mean?
Gerald takes the ACT Assessment mathematics test and scores 27. ACT math scores for 2007 were Normally distributed with mean 21.0 and standard deviation 5.1. What is Eleanor's standardized score?
Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury system appear to be fair?
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