Write the number in standard and expanded form. 304,800,400
1 answer:
We have to express the number 304,800,400 in standard and expanded form.
The expanded form is shown as a sum of each digit multiplied by its matching place value. Let us express the number in expanded from.
So, 304,800,400 =
=
So, this is the expanded form of the given number.
Standard form is a way of writing down very large or very small numbers easily.
The standard from of the number is:
304,800,400 = .
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Answer:
A. The larger the sample size the better.
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean and standard deviation
In this question:
We have to look at the standard error, which is:
This means that an increase in the sample size reduces the standard error, and thus, the larger the sample size the better, and the correct answer is given by option a.