Find and interpret the mean absolute deviation of the data. round your answer to the nearest tenth if necessary.

| 1 | 5 | 2 | 2 |
| 2 | 4 | 4 | 0 |


please let someone know how to answer this!!

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.

There are 93 calories in a small candy bar how many calories are ther in a half dozen small candy bars?

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?