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Whenever batches of material are produced and then split into smaller units, a split-plot type of design often occurs. A CRD design would require 36 different batches of pulp produced and the entire batch of pulp would be cooked at one temperature level. Note that if only a single batch of pulp was produced under each preparation method and split into 12 sub-batches for the cooking factor, this would be an example of pseudo-replication. Why?
New population of pilots has normally distributed weights with mean of 128 lb and standard deviation of 31.7 lbs. If the pilot is randomly selected, determine the probability that his weight is between 120 lb and 181 lb.
Construct a relative frequency distribution for the weights of regular Coke by starting the first class at 0.7900 lb. and use a class width of 0.0050 lb.
How large a sample is needed to find the population mean within $250 at 99 percent confidence?
Suppose that a survey is being planned for purposes of estimating the average number of hours spent exercising daily by adults (18 years of age or older) living in a certain community.
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
The researcher found that Lincoln's educational score did not correlate with the expected variables.
The Cadet is a popular model of sport utility vehicle, known for its relatively high resale value. The bivariate data given below were taken from a sample of sixteen Cadets
If the true mean for Saturday sales is now $4500, what is the probability of accepting the (false) null hypothesis in (a) above (the probability of not sharing the manager's concern because of lack of evidence)?
The analysis needs to be re-run adding the error into the regression sum of squares.
Compute standard error of mean? Compute the margin of error, with 95% confidence.
Test the hypothesis that the proportion of all student cell phone users in the United States who own a smartphone is 35%. Use the 5% level of significance and report your results.
The manufacturer would like to establish inventory levels such that there is only a five percent chance of running out of stock. Where should the manufacturer set the inventory level?
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