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3 years ago

14

Ribbon ones are made from strips of ribbon tied to sticks Connie has 84 feet of red ribbon 48 feet of blue ribbon and 72 feet of

white ribbon she wants to cut the ribbon into equal links that are as long as possible so that no ribbon is wasted

1 answer:

WARRIOR [948]3 years ago

4 0

Red: 7 12-foot pieces
blue: 4 12-foot pieces
white: 6 12-foot pieces

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Find the distance between the points (-3, 4) and (1, 7).

makvit [3.9K]

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3 years ago

Can you help? i’ll give brainliest

m_a_m_a [10]

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Step-by-step explanation:

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Hope this helps :)

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3 years ago

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4 years ago

The mayor of a town has proposed a plan for the construction of a new community. A political study took a sample of 1300 voters

Kryger [21]

Answer:

The value of the test statistic is t = 2.19.

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 $s = \sqrt{\frac{p(1-p)}{n}}$

Our test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the expected mean, $\sigma$ is the standard deviation and n is the size of the sample.

Sample of 1300 voters:

This means that $n = 1300$

Found that 45% of the residents favored construction.

This means that $X = 0.45$

A political strategist wants to test the claim that the percentage of residents who favor construction is more than 42%.

This means that $\mu = 0.42$ , and by the Central Limit Theorem:

$\frac{\sigma}{\sqrt{n}} = s = \sqrt{\frac{0.42*0.58}{1300}} = 0.0137$

So, the test statistic is:

$t = \frac{X - \mu}{s}$

$t = \frac{0.45 - 0.42}{0.0137}$

$t = 2.19$

The value of the test statistic is t = 2.19.

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3 years ago