Assumption about the true population parameter
To calculate beta requires making a "what if" assumption about the true population parameter, where the "what-if" value is one that would cause the null hypothesis to be false.
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Find the test statistic, P-value, and critical value. Round to 3 decimal places. Claim: The mean IQ score of statistics professors is greater than 118. Sample data: n = 50, x = 120. Assume that ? = 15 and the significance level is ? = .05
Assume that the actual surgery duration of this operation suite has a sample mean as x=70 minutes and standard deviation as s=15 minutes. The sample size is n=248. Construct a point estimation for the mean of actual surgery duration, and give its
If IQ scores are normally distributed with a mean of 100 points and a standard deviation of 15 points, what proportion of test takers have a score equal or greater than 115?
What are the Z scores above and below the mean that contain the middle 90% of a normal distribution?
What kind fo test should we use to evaluate whether there are differences in the proportion of people with cancer in the different power line exposure groups? State any assumptions that are required to perform the test and evaluate whether they ar
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Let X have the cumulative distribution function F(x) = 1-e^-x-1, x > -1. Find µ of X by using the MGF of X.
Consider a parallel system of 3 components: the system functions as long as at least one of its components functions. Let Xi be the lifetime of the ith component, and assume that Xi, i = 1, 2, 3, are i.i.d. exponential random variables with rate ?
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