Subgroups of four power units are selected once each hour from an assembly line, and the high-voltage output of each unit is measured. Suppose that the sum of the ranges of 30 such subgroups is 85.2. Calculate the centerline and control limits of an R chart, if (σ) sigma is 1.2 for this data.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

57.09 minus 7.0435 equals

step-by-step explanation:

just subtrach them both and u get the answer of 50.0465