Answer: 13
Step-by-step explanation:
If the prior population proportion is unavailable then the formula to find the sample size is given by :-

, where z* = Critical z-value
E = margin of error
Let p be the proportion of Americans who support the gun control in 2018.
As per given , we have
Confidence level = 99%
The critical z-value for 99% confidence interval is 2.576 ( BY z-table)
Margin of error : E= 0.36
Since there no prior information about the proportion of Americans who support the gun control in 2018.
So , the required sample size to estimate 99% confidence interval would be:


Hence, 13 Americans should be surveyed.
Answer:
q = r
Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given 2q – r = 4p ...(i)
2r = q...(ii)
r = 2p ...(iii)
Substitute 2r = q in equation (i)
<em> 2(2r) – r = 4p </em>
3 r = 4 p
<em> 2 r + r = 4 p</em>
2 r + 2 p = 4 p
2 r = 2 p
<em> q = r</em>
12 boys and 27 girls
1) Add 4 to 9. 13
2) 39 divided by 13 is 3
3)Multiple 3 to 4 boys and 9 girls. 3x4 is 12 boys, 3x9 is 27 girls
Hope this helps!
468
x 76
_____
2408
+ 321650
_________
35,168
The first table shows does not represent a direct variation because their is no constant ratio between the numbers while the rest of the tables have a common ratio.