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Natalka [10]
3 years ago
5

A study reports that 75 percent of young adults in a county get their news from online sources. A sociologist believes that the

percentage is actually greater than 75 percent. The sociologist will select a random sample of young adults from around the county to interview. Which of the following is the most appropriate method for investigating the sociologist’s belief?
A. A one-sample zz-test for a difference in population proportions
B. A one-sample zz-test for a sample proportion
C. A one-sample zz-test for a population proportion
D. A two-sample zz-test for a difference in population proportions
E. A two-sample zz-test for a difference in sample proportions
Mathematics
2 answers:
lilavasa [31]3 years ago
7 0

The following is the most appropriate method for investigating the sociologist’s belief is,

A. A one-sample zz-test for a difference in population proportions

Step-by-step explanation:

  • The young adults in a county get their news from online sources are 75 percent.
  • But according to sociologist the percentage is actually greater than 75 percent.
  • The correct answer is A one-sample zz-test for a difference in population proportions.
  • The One proportion Z-test is used to compare proportion which is observed to a theoretical one, only when there are only two categories.
  • A z-test is a statistical test which is used to determine whether there are two population which means there are different when the variances are known and the sample size is relatively large.

Vesnalui [34]3 years ago
3 0

Answer:

C. A one-sample z-test for population proportion

Step-by-step explanation:

You only need one sample to compare to the null hypothesis and to determine z.

It will be for population propotion because were are trying find evidence for the population not just the sample.

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What two positive real numbers whose product is 7272 have the smallest possible​ sum?
nadezda [96]
\sqrt{7272} and \sqrt{7272}, or as a rounded decimal 85.28 and 85.28. 

To find the smallest possible sum of roots for any product, the answer is always whatever numbers are closest together. This fact can be derived by the fact that the greatest area we can enclose with a given length is a perfect square. So we can take the square root of 7272 and use that, since they will be exactly the same number. 

If you are looking for whole numbers, you would have to go up or down until you find a factor of 7272 closest to the square root. In this case that would be 72 and 101. 
3 0
3 years ago
The length of a rectangle is shown below: On a coordinate grid from negative 6 to positive 6 on the x-axis and on the y-axis two
Degger [83]

9514 1404 393

Answer:

  3.  C(−1, −5), D(2, −5)

Step-by-step explanation:

The given points are 2 -(-1) = 3 units apart horizontally, so the remaining points will need to be 18/3 = 6 units below, vertically. Translating the given points down 6 gives ...

  D = A -(0, 6) = (2, 1) -(0, 6) = (2, -5)

  C = B -(0, 6) = (-1, 1) -(0, 6) = (-1, -5)

The two points required to make a rectangle with an area of 18 square units are ...

  C(-1, -5), D(2, -5)

_____

The area of a rectangle is the product of length and width. If the area is 18 square units, and the width is 3 units, then the length must be 6 units. 3×6=18.

5 0
2 years ago
What answee is it?? :))))
Nataliya [291]

Step-by-step explanation:

The answer is C

We can easily eliminate B and D since Ms. Macdonald isn't starting with 3 rabbits.

We can also eliminate choice A, because 5 to the 3rd power isn't 15.

5 to the 3rd power is 125, therefore the choice is C

8 0
2 years ago
Read 2 more answers
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