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Use the critical values for z of 1.65 and a p level of approximately 0.10, or 10%. For each of the following values, determine if you would reject or fail to reject the null hypothesis:
a. z 0.95
b. z 1.77
c. A z statistic that 2% of the scores fall above
A random sample of 12 paired observations indicated a correlation of .32. Can we conclude that the correlation in the population is greater than zero? Use the .05 significance level.
The population mean of a company's racing bicycles is 9.07 kg (20.0 lb) with a population standard deviation of 0.40 kg. If the distribution is approximately normal
What is the purpose of a post-hoc test with analysis of variance? What is probabilistic equivalence? Why is it important?
Given that a Brand A battery just failed, what is the expected value of the time we wait until the next Brand B failure?"
Job Interviews: Based on information from MRINetwork, some job applicants are required to have several interviews before a decision is made. The number of required interviews and the corresponding probabilities are: 1 (0.09); 2 (0-31); (0.37); 4 (..
You read that statistical test at α=0.01 level has probability 0.14 of making a Type II error when specific alternative is true. Calculate the power of test against this alternative?
In a certain town, 60% of adults have a college degree. The accompanying table describes the probability distribution for the number of adults
Create a 90 percent confidence interval for the population proportion of all such firms with this as the primary motivation.
510 people were asked which of four fast food restaurant were their favorite. Determine if there is a preference for any one place over any other.
Calculate the expected number of days it takes to get the order and standard deviation.
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
A Cornell university study of wage differentials between men and women reported that one of the reasons wages for men are higher than wages for women is that men tend to more years of work experience than women. Suppose the following results were ..
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