Answer:yyyyyy
Step-by-step explanation:
Answer:
n = 484
Step-by-step explanation:
If Confidence Interval CI = 95 % then α = 5% and α/2 = 2,5 %
α/2 = 0,0125
MOE for normal distribution is:
MOE = z * σ/√n
For α/2 = 0,0125 ⇒ z(score) = -2,2
MOE = |-2,2| * 4/√n
0,4*√n = 8,8
√n = 8,8 / 0,4
√n = 22
n = 484
42% of what is 63
0.42x = 63
x = 63/0.42
x = 150
There are 150 dancers in the school
Answer:
1.55
Step-by-step explanation:
