Average Iligh Temperatures,
I. Listed below are some average high temperatures for our
area
during the months from July to December
October
8"F;
July: 90"}
August 92°F
September 88
November
December RATE
II. Make a bar graph to show the temperatures listed in the
box above,
Be sure to include a title and all labels for the grade

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.