1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mrrafil [7]
3 years ago
15

Can some one help me with angles and exterior angles stuff

Mathematics
1 answer:
Mila [183]3 years ago
5 0
What’s the question/problem?
You might be interested in
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. Whe
kherson [118]

Answer:

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}  

n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11  

And rounded up we have that n=1068

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.03 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)

We don't have a prior estimation for the proportion \hat p so we can use 0.5 as an approximation for this case  

And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11  

And rounded up we have that n=1068

5 0
3 years ago
If 7 key chains cost $55.65, then 12 key chains cost $
Nimfa-mama [501]
Divide $55.65 by 7 to get the cost of 1 key chain ($7.95). Then multiply the cost of 1 by 12 and get $95.40
3 0
3 years ago
PLS HELP! What are the solutions of 4x^2-8x+5=0
Shkiper50 [21]
<span><span> x = -1/2 = -0.500
</span><span> x = 5/2 = 2.500

EITHER ONE WORKS</span></span>
3 0
3 years ago
Read 2 more answers
The graph of a linear function is shown.
lawyer [7]

Answer:

Step-by-step explanation:

y=1/5+0 is the answer to your problem I very much believe

4 0
2 years ago
The function (t) = 300,000t represents the distance (in kilometers) that light travels in t seconds
Anika [276]

Answer:

The answer is: 4,500,000 kilometers or in scientific notation: 4.5 x 10^6 kilometers.

Step-by-step explanation:

Multiply to get the answer:

300,000 * 15 =

4,500,000 km

In scientific notation: 4.5 x 10^6

4 0
3 years ago
Other questions:
  • A fluorite crystal is shaped like a regular octahedron with edges that are 2.1 inches. Which of these is the volume of the fluor
    13·1 answer
  • What is 128% of 550?
    14·2 answers
  • What is the solution to <br> 2x-y=7 <br> Y=2x+3
    7·1 answer
  • Victoria is the food basket for Australia. In 2017, Victoria witnessed a severe drought that is reported to be the worst in many
    9·1 answer
  • Of the students at Milton Middle School, 120 are girls. If 50% of the students are girls, how many total students are there at M
    11·1 answer
  • A rectangular room has a diagonal measure of 20 meters. the room is four meters longer than it is wide. find the room's dimensio
    12·1 answer
  • I will give brainiest answer
    14·2 answers
  • Please answer CORRECTLY !!!!!!!!! Will mark brainliest !!!!!!!!!!
    12·1 answer
  • Mike has 1/8 of a teaspoon How many times should Mike use this teaspoon to measure 4 teaspoons of vanilla extract?​
    8·2 answers
  • Graph the geometric sequence 6, 12, 24, 48
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!