8. In clinical trials of the allergy medicine Clarinex (5 mg) it was reported that 50 out of 1655 individuals in the Clarinex group and 31 out of 1652 individuals in the placebo group experienced dry mouth as a possible side effect of their respective treatments. The results of a 95% confidence interval for the proportion of Clarinex users who experienced dry mouth minus the proportion of placebo takers who experienced dry mouth are : (0.0009, 0.0220 ). Interpret the interval in context.

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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.