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A student randomly surveyed n = 36 other students and found that the mean amount of money spent on texts was x‾ = $121.60. If the standard deviation of the population was σ = $6.36, find the 90% confidence interval of the mean.
for the data set below if you were to fit a regression equation what would the value of r2 be to two decimals? hint
question the monthly sales of mufflers follow the normal distribution with a mean of 1200 and a standard deviation of
consider the first order model equation in 3 quantitives independent variablese y 1 2x1 x2 -3x3a graph the relationship
Each test of an integrated circuit produces an acceptable circuit with probability p, independent of the outcome of the test of any other circuit. In testing n circuits, let K denote the number of circuits rejected and let X denote the number of a..
The following four comments expand the list given in the text under factors that predict the fees generated by a client that suggest six explanatory variables that can be added to the regres- sion model. Use these to improve the fit of the model s..
In American football, touchdowns are worth 6 points.
environmentalists are concerned about emissions of sulfur dioxide into the air. the average number of days per year in
What is the value of μ for the network? What is the value of σμ2 for the network? What is the probability that this network can be finished within 27 days?
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
suppose that the times people spend being served at a post office window are approximately normal with mean 1.5
suppose the service time in minutes at a bank has the exponential distribution with lambda 12. use the central limit
Using the weights of women with the distribution N(160, 15), find the exact percentages below using the Normal table found in your Salkind text.
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