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Alex73 [517]
3 years ago
10

One study, based on responses from 1,017 randomly selected teenagers, concluded that 39% of teenagers cite grades as their great

est source of pressure. use a 0.05 significance level to test the claim that fewer than half of all teenagers in the population feel grades are their greatest source of pressure
Mathematics
1 answer:
klasskru [66]3 years ago
3 0

Answer:

The hypothesis formulae will be

H0 : p = 0.5

Ha : p < 0.5

we will reject H0.

Step-by-step explanation:

Number of responses ( n ) = 1017

percentage( p ) = 39% = 0.39

significance level ( ∝ ) = 0.05

P0 = 50% = 0.5

<u>Test the claim that fewer than half of all teenagers feel the pressure </u>

The hypothesis formulae will be

H0 : p = 0.5

Ha : p < 0.5

Perform the test statistic

Test statistic ( Z ) = -6.957

P-value < 0.05   we will reject H0.  

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Which function is undefined for x = 0? y=3√x-2 y=√x-2 y=3√x+2 y=√x=2
Andre45 [30]

For this case, we must indicate which of the given functions is not defined forx = 0

By definition, we know that:

f (x) = \sqrt {x} has a domain from 0 to infinity.

Adding or removing numbers to the variable within the root implies a translation of the function vertically or horizontally. For it to be defined, the term within the root must be positive.

Thus, we observe that:

y = \sqrt {x-2} is not defined, the term inside the root is negative when x = 0.

While y = \sqrt {x + 2} if it is defined for x = 0.

f(x)=\sqrt[3]{x}, your domain is given by all real numbers.

Adding or removing numbers to the variable within the root implies a translation of the function vertically or horizontally. In the same way, its domain will be given by the real numbers, independently of the sign of the term inside the root.

So, we have:

y = \sqrt [3] {x-2} with x = 0: y = \sqrt [3] {- 2} is defined.

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Answer:

y = \sqrt {x-2}

Option b


6 0
3 years ago
Write an exponential function of the form f(x) = ab* whose graph passes through the
Andrews [41]

Answer:

Step-by-step explanation:

let f(x)=ab^x

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\frac{ab^2}{ab}=\frac{18}{6}\\b=3\\ab=6\\3a=6\\a=2\\f(x)=2(3)^x

4 0
3 years ago
A sheet metal company had 5 contracts last month. The contracts were worth $5600, $2800, $7450, 1900, and $8900. Materials, sala
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Answer:

Step-by-step explanation:

Do percent Proportions

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5

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idk sorry

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