Please help me the picture is above I’ll mark as brainliest. I really need the answer

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.

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)