Bakery A recorded the number of cake dozens sold on five days as 18, 20, 22, 22 and 18.
Bakery B recorded 19, 19, 20, 21 and 21 for the same five days.
Which bakery showed more consistent daily sales?
(a) Bakery A, because its standard deviation is smaller.
(b) Both bakeries are equally consistent since their means are equal.
(c) Bakery B, because its standard deviation is smaller.
(d) Bakery A, because its range is smaller.