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Delvig [45]
2 years ago
5

Perform the indicated operation.

Mathematics
1 answer:
Evgen [1.6K]2 years ago
3 0

Answer:

-2

a^2+5a+6

Step-by-step explanation:

this is the answer

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The sum of three times a number and 4

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How many women must be randomly selected to estimate the mean weight of women in one age group.we want 90% confidence that the s
mojhsa [17]
That is a very good question....

Look Grank

you know that:

confidence interval = mean +or- Margin of Error

and

Margin of Error = (z)*(standard deviation) / (sqrt of n)
where n is the number of sample records

So we need to calculate z-value firstly

It says: "<span>we want 90% confidence"

So that:
</span>
<span>confidence90% corresponds to z-value of 1.645

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7 0
3 years ago
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