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For a normal distribution with m = 100 and σ = 5, what is the probability of selecting a score between X = 90 and X = 110? In symbols, what is p(110 X 90)?
To test whether there is any association between two variables using Chi-Square test for independence.
A variation of the binomial distribution arises when the n trials are all independent, but the probability of a success on the ith trial is θi, and these probabilities are not all equal. If X is the number of successes obtained under these condit..
(a) What is the average number of machines not in use? (b) What proportion of time is each machine in use?
when 12 bolts are tested for hardness their indexes have a standard deviation of 41.7. test the claim that the standard
the ages of subscribers to a certain mailing list are normally distributed with mean 35.5 years and standard deviation
suppose the amount of cosmic radiation to which a person is exposed folows normal distributioin with a mean 5.853 and
In a sample survey, 200 of 800 individuals enrolled in our managed-care organization indicated that they favored a proposal to extend office hours from 5:00 to 8:00 p.m. Construct a 95% confidence interval for the corresponding true proportion.
Consider a random sample of six families who are asked if their children have an influence on their vacation destination.
question 1. what is a lsquorandom sample?question 2. explain the terms simple random sampling systematic sampling
on a standard iq test the standard deviation if 15. how many random iq scores must be otained if we want to find the
What is the value of 1sigma 2sigma 3sigma 4sigma 5sigma 6sigma
What is the difference between statistical significance and practical significance? What is a type I and type II errors in hypothesis testing? What would be examples of each? Explain
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