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tekilochka [14]
3 years ago
11

ASAP HELP PLEASE!!! What is the value of x?

Mathematics
1 answer:
sleet_krkn [62]3 years ago
8 0
The answer is 45 degrease
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A researcher claims that the mean cost of raising a child from birth to age 2 by husband­wife families in the U.S. is $13,960. A
irina1246 [14]

Answer:

Yes, there enough evidence to reject the claim.

Step-by-step explanation:

Here we need to perform a test for single mean to determine whether the  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is $13,960.

The hypothesis is:

<em>H₀</em>: The  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is $13,960, i.e. µ = $13,960.

<em>Hₐ</em>: The  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is different from $13,960, i.e. µ ≠ $13,960.

The information provided is:

\ar x=13725\\\sigma=2345\\n=500\\\alpha =0.10

The test statistic is:

z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}=\frac{13725-13960}{2345/\sqrt{500}}=-2.24

The test statistic value is -2.24.

Compute the <em>p</em>-value for this test statistic value at 10% level of significance as follows:

p-value=2\times P(Z

               =2\times 0.01255\\=0.0251

Use the <em>z</em>-table.

The calculated <em>p</em>-value is, 0.0251 < 0.10, therefore the null hypothesis will be rejected.

<u>Conclusion</u>:

As the null hypothesis is rejected at 10% level of significance it can be concluded that there enough evidence to reject the claim.

The  mean cost of raising a child from birth to age 2 by husband-wife families in the U.S. is different from $13,960.

5 0
3 years ago
Solve for x.<br><br> x / 4 ≥ - 8
MariettaO [177]

Answer:

x \geqslant ( - 32) \:  \:  \: \:  or \:  \:  \:  \: ( - 32) \leqslant x

Step-by-step explanation:

\frac{x}{4}  \geqslant  - 8 \\ x \geqslant  - 8 \times 4 \\ x \geqslant  (- 32) \\

3 0
2 years ago
In the triangle below, angle B measures 60° and BC is 18. What is the length of AC?
Gre4nikov [31]

Answer:

The Answer is D StartFraction StartRoot 3 EndRoot Over 9 EndFraction

Step-by-step explanation:

Just took the test one Edge, sorry its late.

6 0
3 years ago
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The question is looking for the amount of boxes (24 per box) needed for the event (300). If you multiply 24 by each number, you would be able to find the answer. 24*11 = 264, so that isn’t enough. 24*12 = 288, and that also isn’t enough. But if you do 24*13, you get 312, which gives you more than enough cupcakes for the event. So the answer is 13.
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V + 2 &gt; - 19 I need help solving​
sammy [17]

Answer:

first figure out what v is then add it with 2 then compare

Step-by-step explanation:

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