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Please explain what Minitab does in backward elimination and in stepwise (forward and backward) automatic regression procedures.
Explain clearly what is meant by a false negative rate of 5% and a false positive rate of 15%. If the population were screened, what proportion would be expected to test negative for metropathy?
What is the probability that the mean breaking strength of the 3 untreated specimens is at least 25 pounds greater than the mean strength of the 3 treated specimens?
A group of teenagers were monitored closely over the period of several weeks to measure how frequently they watched violent television programs.
in the world series of baseball two teams a and b play a sequence of games against each other and the first team that
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
Jolly Blue Giant Health Insurance is concerned about rising lab test costs and would like to know. Determine the essential sample size?
a sample of nurses revealed their mean income to be 72000.00 for 9 months with a standard deviation of 3000.00 what
At the 0.10 significance level was the sample result different from the usual pattern? Show how to plug this in megastat and if it is chi square or anova.
a survey conducted by the american automobile association showed that a family of four spends an average of 215.60 per
Test the hypothesis at the 0.05 level. What is the value of the test statistic calculated from the sample data? What is the critical value of the test statistic?
Scores for men on the verbal portion of the SAT test are normally distributed with a mean 509 and a standard deviation of 112. Randomly selected men are given the Columbia
The cost of using the equipment is $250. The materials used in one shirt cost $10, and Gina can sell these for $15 each. How many shirts must Gina sell to break even?
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