Answer:
A sample of 796 is needed.
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:
In this question, we have that:
91% confidence level
So , z is the value of Z that has a pvalue of , so .
How large should a sample be if the margin of error is .03 for a 91% confidence interval
We need a sample of n, which is found when . So
Rounding up
A sample of 796 is needed.
Answer:
x=16
Step-by-step explanation:
The population of the animal in 2006 was 3,116.
To find this answer you simply add.
2,814 + 302 = 3,116
Note: Since this problem says fewer than you add. If it said more than or greater than you would subtract.
Hope this helps, have a great day, stay safe and positive!!!!
:)
Answer:
(5,-3) if the system is
y=x-8
2x+3y=1
Step-by-step explanation:
I think the system is to read:
y=x-8
2x+3y=1.
Please correct me if I'm wrong.
I'm going to plug 1st equation into 2nd equation giving me:
2x+3(x-8)=1 ->I replaced y with (x-8).
Distribute:
2x+3x-24=1
Combine like terms:
5x-24=1
Add 24 on both sides:
5x=25
Divide both sides by 5:
x=5
If y=x-8 and x=5, then y=5-8=-3.
The solution is (5,-3).
<span>2 pieces of ribbon measuring 1/3 meter can be cut from a piece of ribbon measuring 3/4 meters. 3/4-2/3 is 1/12 meaning that 1/12 meters is leftover.</span>