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Murljashka [212]
3 years ago
9

Whats a Factor tree?

Mathematics
1 answer:
Gelneren [198K]3 years ago
8 0
A factor tree is a diagram used to determine the prime factors of a natural number greater than one.
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Step-by-step explanation:

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In a random sample of 18 families, the average weekly food expense was $95.60 with a sample standard deviation of $22.50. Determ
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t-distribution should be used to construct a confidence interval.

Step-by-step explanation:

We are given that a random sample of 18 families, the average weekly food expense was $95.60 with a sample standard deviation of $22.50.

We have to determine whether a normal distribution (Z values) or a t- distribution should be used or whether neither of these can be used to construct a confidence interval.

<em><u>Since in this question we are provided with;</u></em>

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Sample standard deviation, s = $22.50

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The distribution that we will use here to construct a confidence interval will be <u>t-distribution</u> because in the question we don't know anything about population standard deviation (\sigma) .

Normal distribution is used when we know population standard deviation (\sigma).

So, the pivotal quantity for confidence interval that will be used is One-sample t-test statistics;

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Therefore, t-distribution should be used to construct a confidence interval.

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