Answer:
At least 9604 drivers need to be surveyed to be 95% confident that the population proportion is estimated to within 0.01.
If confidence level is chosen higher than 95% then minimum sample size requried in the survey increases
Step-by-step explanation:
The following formula is used to compute the minimum sample size required to estimate the population proportion within the required margin of error:
n≥ p×(1-p) × where
- p is the population proportion who always buckle up before riding in a car (estimated as 0.5 when unknown)
- z is the corresponding z-score for 95% confidence level (1.96)
- ME is the margin of error in the estimation (0.01)
Then,
n≥0.5×0.5 × ≈ 9604
If confidence level is chosen higher than 95% then the z value in the equation would be bigger than 1.96. Therefore minimum sample size requried in the survey increases.
Hello!
You can make two expressions based on what you know
let x equal the larger number
let y equal the smaller number
x + y = 95
x + 2y = 120
We can use elimination to get rid of x
You can subtract the two equation to get rid of x
-y = -25
Since y is negative we can multiply both sides by -1 to make y positive
y = 25
Now we can put this into one of the other equations to find x
x + 25 = 95
subtract 95 from both sides
x = 70
The answers are 70 and 25
Hope this helps!
<span>30 lbs.
The question itself tells you how to solve it. Since you're serving boneless chicken, that would be "meat with little or no bone, divide the number to be served by 3.5". And you've been given 100 guests. So:
100 / 3.5 = 28.57142857
And of the 4 options given 30 lbs is the closest, so that's the correct answer.</span>
Answer:
okay...need more information
Step-by-step explanation:
The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; its value is 9.8 m/s/s, down, The vertical velocity of a projectile changes by 9.8 m/s each second, The horizontal motion of a projectile is independent of its vertical motion.
Answer:
26 total questions
Step-by-step explanation:
6 * 2 = 12
7 * 2 = 14
14 + 12 = 26