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2 years ago

Can someone help me understand how to create 3 proofs

Mathematics

1 answer:

Katarina [22]2 years ago

7 0

Step-by-step explanation:

If I'm understanding what a "proof" means, some answers could be:

2 + 3 = 5

4 + 15 = 19

8 + 21 = 29

Hope this helps you! Have a good night!

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A growth-mindset researcher plans to take an SRS of 200 teenagers from the population of teenagers in North America to see what

Sonbull [250]

Answer:

The mean of the sampling distribution of p is 0.75 and the standard deviation is 0.0306.

Step-by-step explanation:

Central Limit Theorem:

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean $\mu = p$ and standard deviation $s = \sqrt{\frac{p(1-p)}{n}}$

75% of teenagers in North America are pursuing a goal they have set for themselves.

This means that $p = 0.75$

Sample of 200.

This means that $n = 200$ .

What are the mean and standard deviation of the sampling distribution of p?

By the Central Limit Theorem

Mean $\mu = p = 0.75$

Standard deviation $s = \sqrt{\frac{0.75*0.25}{200}} = 0.0306$

The mean of the sampling distribution of p is 0.75 and the standard deviation is 0.0306.

4 0

2 years ago

A test is normally distributed with a mean of 70 and a standard deviation of 10. Todd

Damm [24]

Answer:

negative

Step-by-step explanation:

calculating the z score by subtracting the mean and dividing by the standard deviation

(55-70)/10= -1.5

It's negative

5 0

3 years ago

Find b. Round to the nearest tenth.

Svetradugi [14.3K]

Find Angle B: B = 180 - (82+55) = 43. Then apply the law of sines:

b 8 cm
--------- = ----------
sin 43 sin 55
(sin 43)(8 cm)
Solving for b, we get b = ------------------- = 6.66, or 6.7 (cm, to the nearest tenth).
sin 55

5 0

2 years ago

Read 2 more answers

Solve for x to the nearest tenth.

Liula [17]

Answer: 11.4

Step-by-step explanation: