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An experiment produces a zero mean Gaussian random vector X = [X1 ··· Xk] with correlation matrix R = E[XX']. To estimate R, we perform n independent trials, yielding the iid sample vectors X(1), X(2), . . . , X(n), and form the sample correlation matrix
(a) Show (n) is unbiased by showing E[ (n)] = R.
(b) Show that the sequence of estimates (n)is consistent by showing that every element ij(n) of the matrix converges to Rij . That is, show that for any c > 0,
If the opinion poll had announced the margin of error for 80% confidence rather than 95% confidence, this margin of error would be?
a moderate wind accelerates a pebble over a horizontal xy plane with a constant acceleration a 5.00 ms2i 7.00ms2j. at
a television station estimates that 60 of college students watch the super bowl. for a sample of 240 students selected
Shaver Manufacturing, Inc., offers dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution
testing for population mean.atms must be stocked with enough cash to satisfy customers making withdrawals over an
Determine the order of each differential equation, and whether or not the given functions are solutions of that equation on some interval of x values.
There are four entrances to the Government Center Building in downtown Philadelphia. The building maintenance supervisor would like to know if the entrances are equally utilized.
What is the average rating for all CBC movies? How about ABN movies and BBS movies - Create a line graph of the monthly average ratings for CBC for the year. Note that there are multiple ratings data for the months
assume you have any given amino acid sequence. the average length of an non-helical region is 20 amino acids long.
Can the human resource manager conclude, at the 5% significance level, that the job enrichment workshops increase sales consultants' job satisfaction levels? Present your findings to the human resource manager.
a retailer determines that the average number of orders per day for a certain product is 5. assume the poisson
Determine whether the coefficient of correlation in the population is zero. Construct and interpret confidence intervals and prediction intervals for the dependent variable, number of units sold.
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