Answer:
Step-by-step explanation:
We have
Substitute:
Answer: 64
Step-by-step explanation:
Answer:
for part b. the probability fraction is 17 over 20, or 17/20.
Step-by-step explanation:
the percentage of 65 years or older is 85% of the population. 85/100 simplified is 17/20.
Answer:
21378
Step-by-step explanation:
The confidence level is 90%, which gives us a Z of 1.645.
Our equation is (Z^2*p*q)/e^2
(1.645^2*p*(1-.21))/ (.01^2)
E is the error proportion, .01
Q is 1-p or the proportion
P is the pop you need
With this, we can solve
and get p = 21377.5975 and rounded to 21378
