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kupik [55]
3 years ago
11

0.49 + 7.50 what is this answer

Mathematics
2 answers:
Marizza181 [45]3 years ago
7 0
The answer for 0.49+7.50 is 7.99.
worty [1.4K]3 years ago
4 0
0.49 + 7.50 = ?

0.49 + 7.50 = 7.99
Align the decimal places. 


Answer: 7.99
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Step-by-step explanation:

First we stablish the data that we have for each sample:

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Now, in order to obtain the standard error of the differences between the two sample means we combine those two formulas to obtain this:

σx¯1 - σ x¯2  = √(σ₁²/n₁ + σ₂²/n₂ )

So as you can see, we used the square root to simplify and now we require the variance of each sample (σ²):

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σ₂² = (15)² = 225

Now we can proceed to calculate the standard error of the distribution of differences in sample means:

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This gives an estimate about how far is the difference between the sample means from the actual difference between the populations means.

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