What is 18/42 in the simplest form?

2 answers:

8 0

18 | 2
9 | 3
3 | 3
1

42 | 2
21 | 3
7 | 7
1

2,3
GCF (18,42) = 2*3 = 6
$\dfrac{18}{42} = \dfrac{18:6}{42:6} = \dfrac{3}{7}$

notsponge [240]3 years ago

5 0

$\frac{18}{42}=\frac{18:2}{42:2}=\frac{9}{21}=\frac{9:3}{21:3}=\boxed{\frac{3}{7}}$

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A sample of 32 observations is taken from an infinite population. The sampling distribution of a.is approximately normal because

Vanyuwa [196]

Answer:

a.is approximately normal because of the central limit theorem.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question:

Sample limit of 32 > 30, so the distribution is approximately normal because of the central limit theorem, and the correct answer is given by option a.

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Mrac [35]

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