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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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Write the equation of the graph shown below in factored form. a graph that starts at the top left and continues down through the
Brut [27]

Answer:

  (d)  f(x) = (x − 3)^2(x − 2)(x − 1)

Step-by-step explanation:

In this context, a crossing of the axis at x=p means there is a factor of (x-p). A "touch" of the axis at x=q means there is a factor of (x -q)^2.

A crossing at x=1 and x=2, and a touch at x=3 means the factors are ...

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8 0
2 years ago
There are five identical blue books, two identical green books, and three identical black books. How many different patterns can
dsp73

Answer:

2520 patterns

Step-by-step explanation:

In 'n' 10!  ways, books can be arranged. But, there are also 5! permutation of blue books 'n1', 2! permutation of identical green books 'n2', and 3! permutation identical black books 'n3'.

Therefore, for non identical arrangements:

\frac{n!}{n1!n2!n3!}

\frac{10!}{5!2!3!} = 2520

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8 0
3 years ago
The combined math and verbal scores for students taking a national standardized examination for college admission, is normally d
kipiarov [429]

Answer:

The minimum score that such a student can obtain and still qualify for admission at the college = 660.1

Step-by-step explanation:

This is a normal distribution problem, for the combined math and verbal scores for students taking a national standardized examination for college admission, the

Mean = μ = 560

Standard deviation = σ = 260

A college requires a student to be in the top 35 % of students taking this test, what is the minimum score that such a student can obtain and still qualify for admission at the college?

Let the minimum score that such a student can obtain and still qualify for admission at the college be x' and its z-score be z'.

P(x > x') = P(z > z') = 35% = 0.35

P(z > z') = 1 - P(z ≤ z') = 0.35

P(z ≤ z') = 1 - 0.35 = 0.65

Using the normal distribution table,

z' = 0.385

we then convert this z-score back to a combined math and verbal scores.

The z-score for any value is the value minus the mean then divided by the standard deviation.

z' = (x' - μ)/σ

0.385 = (x' - 560)/260

x' = (0.385×260) + 560 = 660.1

Hope this Helps!!!

8 0
3 years ago
Keith recommends ordering 305 gray t-shirts and selling each t-shirt for $20. What is the financial risk of Keith’s recommendati
kap26 [50]

Answer:

do not sell them

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bc i  alredy did

8 0
2 years ago
The difference of 17 and 5 tines a number
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You can answer this problem in two different ways: the first being (17 - 5) * x, and the second being 12 * x.

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