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Given f(x,y)=x3+3xy2-3x2-3y2+4. Find all critical points of f and find extreme values (maxima and minima) and saddle points of f.
professor takes a random sample of students enrolled in statistics 101 at abc university. he finds the following there
Assuming 7 classes with a class interval width of 4, plot the data and construct a curve. What type of distrubtuion is indicated by the curve?
Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.
millions of americans are subjected to drug testing in the workplace. the tests are not always reliable. a false
Use the histogram to determine how many points are out of control according to the upper control limit and lower control limit.
Will an SRS of size 1785 usually give a result p-hat within plus or minus 3 percentage points of the true population proportion? Explain.
suppose that 88 of college men and 82 of college women were employed last summer. a sample survey interviews
it is found that when a particular 4-sided die is rolled a 1 occurs 25.8 of the time a 2 occurs 24.6 of the time a 3
Time and cost word processing in the first two columns of table below we repeat our data on time and cost for a sample of 5 word processing jobs. Cost($) Time (hr) y x 125 5 175 7 325 15 425 20 475 22.5
q1. assume that two independent random samples of size 100 each are taken from a population that has a variance of 36.
Use whole numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 to make up a list of 6 numbers. Use as many of the numbers, as many times as you want. Show a list of six numbers with the largest variance, and a list of six numbers with the smallest variance.
in an assembly-line production of industrial robots gearbox assemblies can be installed in one minute each if holes
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