Using minutes as the unit of measurement on the left-hand side of ...

[geoffrey]

Using minutes as the unit of measurement on the left-hand side of a constraint and using hours on the right-hand side is acceptable since both are a measure of time.
  Indicate whether the statement is true or false

Question 2

A lathe is set to cut bars of steel into lengths of 6 cm. The lathe is considered to be in perfect adjustment if the average length of the bars it cuts is 6 cm. A sample of 121 bars is selected randomly and measured. It is determined that the average length of the bars in the sample is 6.08 cm. The population standard deviation is 0.44 cm. Determine whether or not the lathe is in perfect adjustment. Use a .05 level of significance.

[isabelt_18]

Answer to Question 1

F

Answer to Question 2

H0:  = 6
Ha:   6 z = 2; therefore, reject H0 . There is sufficient evidence at  = .05 to conclude that the lathe is NOT in perfect adjustment.

[geoffrey]

Excellent

[ricroger]

Gracias!