The average weight of 50 randomly selected minivans was 4,200 pounds. The minivan population standard deviation was 520 pounds. Find the 99% confidence interval of the true mean weight of minivans.

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.