how many samples are needed to estimate a p-dimensional covariance matrix how many sample is needed to estimate a p dimensional coefficient? how many samples are needed for a p-dimensional matrix how many data points are needed in predicting a p dimensional covariance matrix? how many samples are needed to estimate a p dimensional covariance matrix how many points are needed to estimate a p dimensional covariance matrix? how many sample are needed for the covariance matrix? how many samples are needed to estimate a p-dimensional covariance matrix how many points are needed to estimate a p-dimensional covariance matrix do sample sizes depend how many points are needed to estimate the p-dimensional covariance matrix? how many samples are needed to estimate a p-dimensional matrix how many points does a covariance matrix need how many examples are needed to estimate the p-dimensional coefficients how many data points are needed to estimate a p-dimensional covariance matrix? how many samples are needed to estimate a p-dimensional covariance matrix how many samples are needed to estimate a p-dimensional covariance matrix? how many sampling points are needed to estimate a p-dimensional covariance matrix? how many samples are needed to estimate a p-dimensional covariance matrix how many points are needed to estimate p-dimensional covariance matrix?