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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.
Construct a 99 percent confidence interval for the mean commission earned by local Tupperware dealers. You may assume the commissions are normally distributed.
A board game enthusiast wonders whether the die provided in her board game is fair. She rolls the die 25 times and observes "6" only one time. State the relevant statistical model and hypotheses. Calculate the p-value and provide a conclusion. ..
the diameter of small nerf balls manufactured at a factory in china is expected to be approximately normally
Participants were assigned to one of three groups in order to study short-term memory with three different types of items: words, non-words, and numbers. Participants were shown a list of items that match their group type, and then were given a te..
Sample mean is 12.2 days and sample standard deviation is 10 days. How many personnel files would director have to choose to evaluate to within 2 days with 99% confidence interval?
A binomial experiment has 10 trials with a probability of success of 0.62 in each trial. What is the standard deviation of the binomial random variable?
Critically illustrate out the term standard deviation. Define mathematical averages. Why is the standard deviation less than the mathematical average?
at a western hospital there were a total of 932 births in 20 consecutive weeks. of these births 216 occured on
how many social robots would need to be sampled in order to estimate the proportion ofrobots designed with legs no
The Complaints Department of a popular used car dealer receives most complaints about the electrical system, particularly the starter.
the table below summarizes results from a study of people who refused to answer survey questions. a market researcher
the manager of a manufacturing company believes that experience is the most valuable variable in determining a workers
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