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Answer:
Step-by-step explanation:
Given
----- variance
------------ sample
Required
Determine the S.E
The estimated standard error (S.E) for the sample mean is calculated using the following formula:
Where
So:
Hence: the estimated standard error for the sample mean is 2
Using the Central Limit Theorem, it is found that each random sample must have at least 10 parents supporting the change and 10 opposing.
<h3>What does the Central Limit Theorem state?</h3>It states that for a <u>proportion p in a sample of size n</u>, the sampling distribution of sample proportion is approximately normal with mean and standard deviation
, as long as
and
.
For the test hpyothesis, two conditions are needed:
- Random samples.
- The sampling distribution must be approximately normal.
Hence each random sample must have at least 10 parents supporting the change and 10 opposing.
More can be learned about the Central Limit Theorem at brainly.com/question/24663213