z statistic or z score can be calculated using the
following formula:
z = (x – u) / (σ / sqrt n)
So simply substitute the given values:
z = (120.4 – 115) / (30 / sqrt 25)
z = 0.90
Answer:
<span>b. 0.90</span>
1.a)add
B) substract
C) multiply
D) one
2) 1002=1.002×10^3
3)2.8×10^-3 < 2.5×10^-2 < 1.2×103 <4×103
I'm not sure... I think it is 60 because 2*3=6 and 9*6=54 and when you add them together you get 60.
