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3 years ago

Need help please with this

Mathematics

2 answers:

saul85 [17]3 years ago

5 0

Answer:

A. 6

B. 48

Step-by-step explanation:

please mark brainliest or leave a heart and rating

Licemer1 [7]3 years ago

5 0

Answer:

a. 6

b. 48

Step-by-step explanation:

For a, replace t with 1. 2^1 is 2, and 3 * 2 is 6.

For b, replace t with 4. 2^4 is 16, and 3 * 16 is 48.

Thank me later! 8)

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3 years ago

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3 years ago

If sample variance is computed by dividing SS by df = n – 1, then the average value of the sample variances from all the possibl

boyakko [2]

Answer:

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And if we take the average value of the sample variances from all the possible random samples we will get the population variance:

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So then the best answer for this case would be:

The average value of the sample variances from all the possible random samples will be exactly the population variance

Step-by-step explanation:

For this case we can define the sum of squares with this formula:

$SS = \sum_{i=1}^n (X_i -\bar X)^2$

Where:

$\bar X =\frac{\sum_{i=1}^n X_i}{n}$

And we can find the sample variance with this formula:

$s^2 = \frac{SS}{n-1}$

And if we take the average value of the sample variances from all the possible random samples we will get the population variance:

$\sigma =\frac{SS}{n}$

So then the best answer for this case would be:

The average value of the sample variances from all the possible random samples will be exactly the population variance

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4 years ago