The overhead reach distances of adult females are normally distributed with a mean of and a standard deviation of . a. Find the probability that an individual distance is greater than cm. b. Find the probability that the mean for randomly selected distances is greater than c. Why can the normal distribution be used in part​ (b), even though the sample size does not exceed​ 30

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

but which class are u may know that first