Answer:
Step-by-step explanation:
Hello!
To evaluate the market for a new car charger, a market researcher surveyed 600 customers and found out that 73% of them own a car.
The parameter of interest is the population proportion and the study variable is "the number of customers that own a car out of 600".
Using the Central Limit Theorem you can approximate the distribution of the sampling proportion to normal:
p'≈N(p;)
Where p' is the sample proportion
p is the population proportion and the mean of the distribution
is the variance of the distribution
Then de standard deviation of the samplig proportion distribution is
You can estimate it using the sample proportion:
Using the same sample proportion but a sample size of n=150, the estimated standard deviation is:
I hope it helps!
Answer:
perimeter you add all sides together:
5x+2 +5x+2 +x +8 +x+8
12x +20
and for Area you multiply:
(x + 8)(5x + 2)
5x^2 + 2x + 40x +16
5x^2 +42x +16
so your answer is the first one or "A"
Answer:
Look that the coordinates and trace those points to a corresponding number on the x or y axis. Then write the first number in the coordinate in the x value and the second number for the y value, repeat the process for the rest of the points.
Step-by-step explanation:
Answer:
3a + b = 180
Step-by-step explanation:
Supplementary angles are angles that, when added, equal 180 degrees.
Let's use a to represent the unknown angle, and b to represent its supplement:
3a + b = 180