A new formula for estimating the water evaporation from occupied swimming pools was proposed and analyzed in an engineering journal. The key components of the new formula are number of pool occupants, area of pool's water surface, and the density difference between room air temperature and the air at the pool's surface Data were collected from a wide range of pools for which the evaporation level was known. The new formula was applied to each pool in the sample, yielding an estimated evaporation level. The absolute value of the deviation between the actual and estimated evaporation level was then recorded as a percentage. The researchers reported the following summary statistics for absolute deviation percentage: X 20.6, S = 20.7. Assume that the sample contained n 14 swimming pools Answer parts a and b below a. Estimate the true mean absolute deviation percentage for the new formula with a 95% confidence interval (Round to two decimal places as needed.) rect Enter your answer in the edit fields and then click Check Answer 1 part remaining clearAl CHeckk Answer a e to search

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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.