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An experiment is run on an operating chemical process in which four variables are changed in accordance with a randomized factorial plan:
(a) Make a table of plus and minus signs from which the various effects and interactions could be calculated.
(b) Calculate the effects.
(c) Assuming three-factor and higher order interactions to be zero, compute an estimate of the error variance.
(d) Make normal plots.
(e) Write a report, setting out the conclusions to be drawn from the experiment, and make recommendations. (Assume that the present conditions of operation are as follows: 1 = 5%, 2 = 40%, 3 = 10 rpm,. 4 = l80°F.)
(l) Show pictorially what your conclusions mean.
Determine the margin of error in estimating the population mean. a sample of 68 college students yields a mean annual income of $3248.
Construct and interpret a 90% confidence interval for the difference in mean score for male and female young adults.
Explain why this model appears to be better than the linear model.- Using the regression analysis above, write an equation of this model.- Interpret the slope of this line.
Perform a significance test to see if there is a relation between mortality and duration of employment in the group hired AFTER 1945 and report a p-value.
a large number of people are waiting in line at espresso royale as it often happens at around noon. the barista
How many independent network servers would be needed if each has 99 percent reliability? (b) If each has 90 percent reliability?
Create simple indices for real exports and real imports with Quarter 1, 2007, used as the base period.
If the scientists want to cut the margin of error in half, how many deer must they inspect?
table. varicella and vaccination varicellavaccinatedyesnototalyes15100115no18927total33109142calculate and interpret
Girls' cross-country times: a contrast (optional). Continue your analysis of the data from the previous problem by comparing average race time during the first half of the season with the average for the second half.
Which is relatively better: a score of 81 on a psychology test or a score of 56 on an economics test? Scores on the psychology test have a mean of 87 and a standard deviation of 9.
Why would it be important to determine if the researchers assigned the women participating in the study at random to one of the two groups? Explain why you think that the researchers included a control group in this study.
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