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Particleboard is made from wood chips and resins. An experiment is conducted to study the effect of using slash chips (waste wood chips) along with standard chips. The researchers make eighteen boards by varying the target density (42 or 48 lb/ft3), the amount of resin (6, 9, or 12%), and the fraction of slash (0, 25, or 50%). The response is the actual density of the boards produced (lb/ft3, data from Boehner 1975). Analyze these data to determine the effects of the factors on particleboard density and how the density differs from target.
suppose that the number of accidents at a nuclear power plant in one week has a poisson distribution with mean 3 and
From past experience, a server at a restaurant knows that her tips follow a right-skewed distribution with mean $6 and standard deviation $4.
1. it was stated in the background that 63 of all us hispanics are mexican american. suppose 850 us hispanics are
Solve the following system of linear inequalities by graphing.
Describe the types of probability -example of classical probability, empirical probability, or subjective probability.
Draw the normal curve model for auto fuel economy, following the 68-95-99.7 rule. Clearly label the X-axis with the mpg for the appropriate points.
five students were randomly selected from a large university. the act scores for these students were 23 12 27 32 and
the statistical procedure ensures that the alpha level for any given planned contrast will not exceed .05
Decision making using the Transportation method.
What is the probability that the sample mean will be at least 1000? Do you need to use the central limit theorism to answer this question? explain.
An instructor claims the average time to take a statistics test is greater than 39 min. As, if a sample of 33 students took 43 min. is the instructor's claim true?
a poll of 1000 americans reported that 42 expect to inherit money from their parents. what is the 99 confidence
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