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:
The length of the container is
Step-by-step explanation:
we know that
The surface area of a triangular prism (a mailing container) is equal to
where
B is the area of the triangular base
P is the perimeter of the triangular base
L is the length of the container
step 1
Find the area of the base B
step 2
Find the perimeter of the base P
step 3
Find the length L of the container
we have
substitute and solve for L
C) 18
the step is in the pict
Answer:
x=7
Step-by-step explanation:
16 because 36 divided by 9 is 4 so you have to multiply the 4 x 4