Answer:
Z = -1.60
it is low ... it appears that for this problem 2 standard deviations below must be reached to be considered "unusual"
Step-by-step explanation:
The next (2) numbers are 40 and 41!
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k2j
j=2,k=2
(2)2×(2)
4×2
=8
the pre-image and the image are congruent
80 students decided to take a vanilla cupcake.
100 * 0.80 = 80
