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
Dominik [7]
3 years ago
11

11.

Mathematics
1 answer:
dedylja [7]3 years ago
6 0
The answer is D. $270.00.
To find this answer, you divide 37.80 by 14%.
You might be interested in
Question (Multiple Choice Wor (07.01) Which of the values in the set {3,4,5,6) is a solution to the equation 4x + 2 = 22? 3 4 5
Murljashka [212]

Answer:

4x+2=22

4x+2-2=22-2

4x=20

4x/4=20/4

x=5

6 0
3 years ago
1/X+4 = 5 it is solving rational equations
finlep [7]
X=1
Subtract four so you get 1/x=1
Multiply by x
1x=1
Divide by 1
7 0
3 years ago
An SRS of 350 high school seniors gained an average of x¯=21 points in their second attempt at the SAT Mathematics exam. Assume
Lynna [10]

Answer:

a) 21-2.58\frac{52}{\sqrt{350}}=13.83  

21+2.58\frac{52}{\sqrt{350}}=28.17  

So on this case the 99% confidence interval would be given by (13.83;28.17)  

b) ME=2.58\frac{52}{\sqrt{350}}=7.17

c) ME=2.58\frac{52}{\sqrt{100}}=13.42

d) D. Decreasing the sample size increases the margin of error, provided the confidence level and population standard deviation remain the same.

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".  

Part a

\bar X=21 represent the sample mean  

\mu population mean (variable of interest)  

\sigma=52 represent the population standard deviation  

n=350 represent the sample size  

99% confidence interval  

The confidence interval for the mean is given by the following formula:  

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}} (1)  

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.005,0,1)".And we see that z_{\alpha/2}=2.58  

Now we have everything in order to replace into formula (1):  

21-2.58\frac{52}{\sqrt{350}}=13.83  

21+2.58\frac{52}{\sqrt{350}}=28.17  

So on this case the 99% confidence interval would be given by (13.83;28.17)  

Part b

The margin of error is given by:

ME=2.58\frac{52}{\sqrt{350}}=7.17

Part c

The margin of error is given by:

ME=2.58\frac{52}{\sqrt{100}}=13.42

Part d

As we can see when we reduce the sample size we increase the margin of error so the best option for this case is:

D. Decreasing the sample size increases the margin of error, provided the confidence level and population standard deviation remain the same.

6 0
3 years ago
When you apply addition, add both side of the equation. Which property of equality is it
Nikolay [14]
I think addition property of equality
8 0
3 years ago
The latest online craze is a new game, Khan on Seven. You get 100 points for playing the game. In addition, you get 50 points fo
Anettt [7]
The inequality would be 50w + 100 >_ 18,000 ( the _ goes under the > but I cannot do that on my phone )
7 0
3 years ago
Read 2 more answers
Other questions:
  • I WILL GIVE BRAINLIEST TO THE CORRECT ANSWER!!!
    15·2 answers
  • 1. Given a sequence is defined by the explicit definition tn=n^2+n, find the 4th term of the sequence. (ie t4)
    14·2 answers
  • Does anyone know the answer to this? I can't figure it out.
    11·1 answer
  • What is six and a half plus 2 1/4
    5·1 answer
  • How many real roots are in<br> X^3 - 4x^2 + 5x<br> A) 0<br> B) 3,<br> C) 1<br> D) 4<br> E) 2
    13·1 answer
  • Use the distributive property to remove the parentheses.<br><br> -7 ( -2w - 4y + 1 )
    6·2 answers
  • 9y - 3 (if y = 10)..
    10·2 answers
  • using the midpoint formula, solve for the midpoint of the segment with these pairs of endpoints (20,-15) and (-11,-10)​
    12·1 answer
  • Please help, my brain just sucks rn. The area of a rectangle is 93.6 square inches. If the length of one of its sides is 5.2 in.
    9·1 answer
  • What is log7 n=(3) log7 8?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!