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
Veronika [31]
3 years ago
15

In an ecological study, the sampling mean proportion is 0.28 and the sample size is 50. What is the margin of error with a confi

dence level of 95%?
Mathematics
1 answer:
babunello [35]3 years ago
3 0
In an ecological study, the sampling mean proportion is 0.28 and the sample size is 50. a) What is the margin of error with a confidence level of 95%?
The solution to a system of two linear equations is (4, -3). One equation has a slope of 4. The slope of the other line is the negative reciprocal of the slope of the first. The system described above is represented by the following equations: y --X-2 y - 4x - 19 Please select the best answer from the choices provided
You might be interested in
Your friend earns 7x dollars for
iren [92.7K]
16 Hours would be 112 and 40 hours would be 280
6 0
3 years ago
5l of 70% alcohol solution was mixed with 9l of pure water what is the concentration of the mixture
ElenaW [278]

The new mixture has a total volume of 5 L + 9 L = 14 L.

70% of the 5 L alcohol solution is alcohol, so that it contributed 3.5 L of alcohol to the mixture. The pure water contributed no alcohol. So in the mixture, the concentration of alcohol is

3.5 L / 14 L = 0.25, or 25%

6 0
3 years ago
Look at the pattern.<br><br> What is the next image in the pattern?
sp2606 [1]

By following the pattern the next image in the pattern is (b) since the correct option is (b).

A recurring arrangement of numbers, forms, colors, and other elements constitutes a pattern in mathematics. The Pattern can be connected to any kind of occasion or thing. When a group of numbers is arranged in a particular way, the arrangement is referred to as a pattern.

From the pattern given: In pattern one, the first column contains 2 blocks and the second column contains 1 block. In pattern second, the first column contains 3 blocks, the second column contains 2 blocks and the third column contains 1 block. In pattern third, the first column contains 4 blocks, the second column contains 3 blocks, the third column contains 2 blocks and the fourth column contains 1 block.

∴ You can observe that block the ks are arranged in descending numbers.

Hence, option (b) is correct.

Learn more about patterns here: brainly.com/question/534678

#SPJ10

7 0
2 years ago
PLZ I REALLY NEED HELP 15 POINTS
Len [333]

To find the X intercept, replace y with 0 and solve for x:

9x + 21(0) = 16

9x = 16

x = 16/9

To find the Y intercept, replace x with 0 and solve for y:

9(0) + 21y = 16

21y = 16

y = 16/21

X-intercept is 16/9

y intercept is 16/21

6 0
3 years ago
Read 2 more answers
Write an expression that represents the sum of a number and 12
vodka [1.7K]
X+12=y
Hope this helps :)
5 0
3 years ago
Other questions:
  • Expression equals 118
    14·1 answer
  • What is the length of the hypotenuse for a right triangle with legs of length 9 and 40? A) 41 B) 43 C) 45 D) 47
    10·1 answer
  • Maths question PLEASE ASAP HELP PLEASE
    7·2 answers
  • There are 20 children in the cast of a class play, and 8 of the children are boys. of the boys, 4 have a speaking part in the pl
    10·2 answers
  • Write the standard form of the line that passes through (-1,-3) and (2,1).
    9·1 answer
  • How many solutions does this equation have?
    5·1 answer
  • Fr.ee points and offering brainliest for the best reply<br> and what is 1 + 1?<br> 25 points
    9·2 answers
  • What are the coordinates of Point X?<br> A. (3, –4)<br> B. (–3, –4)<br> C. (4, –3)<br> D. (4, 3)
    11·2 answers
  • Using a Budget
    10·2 answers
  • Find the area of the figure.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!