The total number of goals each hockey player on the Red Team and the Blue Team has scored during the season is represented on the dot plots below.
Red Team
Blue Team
.
20
30
20
30
22 24 26 28
Number of Goals
22 24 26 28
Number of Goals
Which statement is true about the blue team and red team according to the dot plots.

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.