Que. 1 Calculate and interpret mean absolute deviation

Step 1: Find the mean score

Step 2: Find the distance or deviation of each value from the mean.

Step 3: Find the sum of the distances.

Step 4: Divide the sum by the number of data values to find the MAD.

Solve 2x+y=3 x+y=5 in substitution method

What is an alternate exterior angle

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.