Writing a Linear Function Try it
y
5
Choose the answer to complete each statement.
The slope of the line is
The y-intercept is at
The graph represents the function
4
(3, 4)
3
2
1
X
-5 -4 -3 -2 -1
2 3 4 5
2
(0, -3)
5
Done
Intro

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.