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The use of coding has become particularly significant in recent years. One way to encrypt or code a message uses matrices and their properties. We start with a message coded into matrix form, called A. Multiply A by another matrix B to get AB and send the message.
a) What would we need to decode the message at the other end to get our original matrix A?
b) Would there be any restrictions on this practice?
Calculate the margin of error that would be used to determine a 95% confidence interval for the mean pulse rate of all women.
you are standing in line at the super market when a scientist standing behind you strikes up a conversation with you.
find the minimum sample size required to estimate a population proportion to within 0.05 with 95
Why then does it matter whether we assume straight-line or MACRS depreciation when we assess project NPV?
A study determined that 5% of children fewer than 18 years of age live with their father only. Find the probability that at least 3 persons selected at random from 10 children less than 18 years of age lived with their father only.
People with type O-negative blood are universal donors. That is, any patient can receive a transfusion of O-negative blood. Only 7% of the American population have O-negative blood.
A company is filling bags of rock salt to a level of 50 pounds. It believes that all bags are filled correctly, but would like to use a hypothesis test with an alpha of 0.05 to check this belief. The company will be using samples of 100 bags from eac..
hen investigating a relationship between birth weight and IQ, researchers found that 258 subjects with extremely low birth weights (less than 1000 g) had Wechsler IQ scores at age 8 with a mean of 95.5 and a standard deviation of 16.0.
A sample standard deviation = 5.60 hours, find the upper limit of a 98% confidence interval estimate of the true population mean life.
Calculate a standard error for the sample mean production rate for the new method and what is the standard error of the $1600 estimate?
construct fishers ideal index for the given information and check whether fishersformula satisfies time reversal and
45% of the students at U of M do neither have a tattoo nor a body piercing (other than an ear piercing). 40% of the students at U of M have a tattoo. 30% of the students at U of M have a body piercing
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