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3 years ago

7 12/8 = 7 + 1 ?/8 = ? 1/?

Mathematics

1 answer:

miskamm [114]3 years ago

3 0

Answer:

7 12/8 = 7 + 1 4/8 = 8 4/8

Step-by-step explanation:

To do the first step, we basically want to know what value of x is where 12/8 = 1 x/8. 12/8 is 8/8 + 4/8, or 1 4/8, so x = 4. Now, to do the last step, we just calculate 7 + 1 4/8. This is just 7 + 1 + 4/8, or 8 + 4/8, or 8 4/8.

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Answer:

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Step-by-step explanation:

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According to a poll, 55 % of Americans do not know that GOP stands for Grand Old Party (Time, October 17, 2011). Assume that thi

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Answer:

$\hat p \sim N (p , \sqrt{\frac{p(1-p)}{n}})$

The mean is given by:

$\mu_{\hat p} = 0.55$

And the deviation:

$\sigma_{\hat p} =\sqrt{\frac{0.55*(1-0.55)}{953}}= 0.0161$

Step-by-step explanation:

For this case we assume that the true population proportion of Americans do not know that GOP stands for Grand Old Party is 0.55 and we select a random sample of n = 953 americans

For this case we assume that we satisfy the conditions to use the normal approximation for $\hat p$

1) np >10 , n(1-p)>10

2) Independence

3) Random sample

4) The sample size is less than 10% of the population size

We assume that all the conditions are satisfied and the distribution for $\hat p$ would be:

$\hat p \sim N (p , \sqrt{\frac{p(1-p)}{n}})$

The mean is given by:

$\mu_{\hat p} = 0.55$

And the deviation:

$\sigma_{\hat p} =\sqrt{\frac{0.55*(1-0.55)}{953}}= 0.0161$

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