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A box contains 500 envelopes of which 75 contain $100 in cash, 150 contain $25 , and 275 contain $10. An envelope may be purchased for $25. What is the sample space for the different amounts of money? Assign probabilities to the sample points and then find the probability that the first envelope purchased contains less than $100.
what is the probability that at least 8 of the words on the test are words that the student knows?
The Ludlow Wildcats baseball team, a minor league team in the Cleveland Indians orgainzation, plays 70 precent of their games at night and 30 percent during the day.
What are the advantages and disadvantages of regression models in comparison to using a computerized regression routine? Give examples.
Many companies use sampling to determine whether a batch should be accepted. A (n, c) sampling plan consists of inspecting n randomly selected items from a batch and accepting the batch if c or fewer sampled items are defective.
Use exponential smoothing to develop simple, trend (Holt's), and seasonal models (both simple and trend) for forecasting the quarterly revenue from 1-year batteries.
Conduct the following test using 95% level of confidence.
Emma's On-the-Go, a large convenience store, has to decide where in the store to put its magazine rack. The manager at Emma's experiments with a selection of different locations, choosing a sample of days at each location.
Formulate the null and alternative hypotheses for this application.
For a normal distribution, the probability of randomly selecting a z-score greater than z = -2.00 is p = .0228.
At the .01 level of significance, is the mean grade of the female students higher than that of the males?
Equation of the regression line - Evaluate the equation of the regression line and Find y' when x=47 years.
A health and safety committee is to be selected from all the people who work at a local factory. The committee is to consist of four members selected randomly from a list of ten names.
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