Answer:
We need a sample size of least 119
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
The margin of error is:
95% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
Sample size needed
At least n, in which n is found when 
We don't know the proportion, so we use 
, which is when we would need the largest sample size.
Rounding up
We need a sample size of least 119
Answer:
no solution
Step-by-step explanation:
- Therefore, there is actually no solution! No solution of x, when added to 1, can make negative 4. This is because the absolute sign (the symbol that looks like bars: |#|) automatically makes a number positive.
You need to take the estimate and add the VAT. Then take this total cost and divide it by 12 to solve for the monthly payment needed...
(1450)(105/100)/12=126.875
Clearly, a monthly payment of 130 is enough to cover the yearly cost.
Answer:
C(8,2)
That is the answer for a and b
