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
Gelneren [198K]
2 years ago
13

Please don't take over 5 mins​

Mathematics
1 answer:
ioda2 years ago
4 0

Answer:216

Step-by-step explanation:

You might be interested in
An insurance company is interested in conducting a study to to estimate the population proportion of teenagers who obtain a driv
nlexa [21]

Answer:

n=1041  or higher

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{\hat p(1-\hat p)}{n}})

2) 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 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58

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 0.04 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)  

Since we don't have a prior estimation for th proportion of interest, we can use this value as an estimation \hat p =0.5 And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.04}{2.58})^2}=1040.06  

And rounded up we have that n=1041  or higher.

8 0
3 years ago
It is due today can someone help me.
hammer [34]

Answer:

Start at the Origin, and then go up 5, Right 1.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
14
kipiarov [429]

Answer:

Jumper, y = 172

Shirt, x = - 105

Step-by-step explanation:

Let :

Shirt = x

Jumper = y

5x + 4y = 163 - - (1)

3x + 2y = 29 - - - (2)

Multiply (1) by 3 and (2) by 5

15x + 12y = 489 - - - (3)

15x + 10y = 145 - - - (4)

Subtract :

12y - 10y = 489 - 145

2y = 344

y = 344 / 2

y = 172

Put y = 172 in (3)

15x + 12(172) = 489

15x + 2064 = 489

15x = 489 - 2064

15x = - 1575

x = - 105

The values ;

Jumper, y = 172

Shirt, x = - 105

We weren't supposed to obtain a negative value, kindly check if the parameters given are correct.

5 0
3 years ago
A piece of wood is to be cut so that it is square and has an area of 45 square inches. how long should the sides be, rounded to
Y_Kistochka [10]
6.70 inches is the rounded answer

3 0
3 years ago
K = [ 14 -13 0 3 8 -1 -10 -2 5 ] find the determinant of K
spin [16.1K]

I suppose <em>K</em> is the matrix

K = \begin{bmatrix}14 & -13 & 0 \\ 3 & 8 & -1 \\ -10 & -2 & 5\end{bmatrix}

To compute det(<em>K</em>), you can use a simple cofactor expansion along the first row:

\det(K) = 14\times\det\begin{bmatrix}8 & -1 \\-2 & 5\end{bmatrix} - (-13)\times\det\begin{bmatrix}3 & -1 \\ -10 & 5\end{bmatrix} + 0\times\det\begin{bmatrix}3 & 8 \\ -10 & -2\end{bmatrix} \\\\ \det(K) = 14\times(8\times5-(-1)\times(-2)) + 13\times(3\times5-(-1)\times(-10)) + 0 \\\\ \det(K) = 14\times38 + 13\times5 = \boxed{597}

8 0
2 years ago
Other questions:
  • What are the roots of the quadratic equation below 2x ^ 2 - 12x + 13=0 PLEASE HELP
    10·1 answer
  • Three time the sum of a number and 4 is the same as 18 more than the number.what is the number?
    7·1 answer
  • Erin made 32 rings. She gives rings to 8 of her friends.Which two equations could be used to find the number of rings each frien
    7·1 answer
  • PLEASE MATH HELP WILL GIVE BRAINLIEST!!!!
    8·2 answers
  • A Sweater Usually​ Costs $50.00. It Is On Sale With A Discount Of 10%. What Is The Sale Price Of The Sweater?
    13·2 answers
  • A dairy needs 230 gallons of milk containing 6% butterfat. How many gallons each of milk containing 8% butterfat and milk contai
    14·1 answer
  • Help help help help help helps <br> PLEASE I NEED HELP I CANT FAIL THIS
    13·1 answer
  • WILL GIVE BRAINLIEST: x-5y=15 write in slope-intercept form. . . pls step by step or no brainliest
    13·1 answer
  • Thats all of my points plz help me
    9·2 answers
  • Giren: Lines a and b <br> Are perpendicular.<br> Prove: &lt;3 and &lt;4 are complementary.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!