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Prove that the regression R2 is identical to the square of the correlation coefficient between two variables Y and X. Regression functions are written in a form that suggests causation running from X to Y.
What is the probability that the number of granite selected for analysis is within 1 standard deviation of it means value.
Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90% confidence that the sample mean is within 8 IQ points of the true mean.
the speed of a runner increased steadily during the first three seconds of a race. her speed at half-second intervals
Compare the actual results to those expected from the Poisson probabilities. Explain, how you do the comparison. Does the Poisson distribution serve as a good device for predicting the actual results?
What is the appropriate t-test to conduct and should the null hypothesis be rejected
iven an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations taken at random from this population exceeds 78 is?
1. use the normal distribution of sat critical reading scores for which the mean is 513 and the standard deviation is
Assume there are 18 homes in the Quail Creek area and 9 of them have a security system. Five homes are selected at random: what is the probability all five of the selected homes have a security system?
decide first if binomial or hypergeometric distributions is appropriate. then write which one is most appropriate.
An engineer must decide between spread footings or piles for a foundation to support each column of a building. The soil strength is not known for certain, but could be low (?1), medium (?2), or high (?3). Spread footings for the building have a tot..
the probabilities that a batch of 4 computers will contain 0 1 2 3 and 4 defective computers are 0.6274 0.3102 0.0575
a wrecking ball a is released from rest with angle b. when the ball hits the structure to be demolished the calbe
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