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.
Answer:
25.1327412287
Step-by-step explanation:
Answer:
-3.3,-3,-1/2,0,3,4,21/5,5,6
Step-by-step explanation:
Answer:
$1683.50
Step-by-step explanation:
You are expected to know that a "mill" is one thousandth of a dollar. In this context, it is the amount of tax on one dollar of assessed valuation. So, the tax amount is found by multiplying the valuation by 18.5/1000:
tax = 0.0185 · $91,000 = $1683.50
Answer:
x=11
Step-by-step explanation:
4x + 3 = x+ 2x + 14
4x + 3 = 3 x + 14
4x - 3x = 14 -3
x= 14 - 3
x= 11