The amount of flow through a solenoid valve in an automobile's pollution-control system is an important characteristic. An experiment was carried out to study how flow rate depended on three factors: armature length, spring load, and bobbin depth. Three different levels (low, medium, and high) of each factor were chosen, and a single observation on flow was made for each combination of levels.
(a) The resulting data set consisted of how many observations?

Question

The amount of flow through a solenoid valve in an automobile's pollution-control system is an important characteristic. An experiment was carried out to study how flow rate depended on three factors: armature length, spring load, and bobbin depth. Three different levels (low, medium, and high) of each factor were chosen, and a single observation on flow was made for each combination of levels.
(a) The resulting data set consisted of how many observations?

raffle_snaffle · Answer

@Zarkon

neonumbrella5115 · Answer

Can you identify some observations?  At least try to find one and then we can look for more.