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Mathematics

1 answer:

k0ka [10]3 years ago

5 0

Using unit concepts, it is found that:

a) Grams.
b) Grams.
c) Grams squared.
d) Grams squared.

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For a data-set, the standard deviation has the same unit as the data-set, both for the sample and the population.
The variance has the unit squared, both for the sample and the population.
For example, if the data-set is in metres, the standard deviation will be in metres while the variance will be in squared metres.

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In this question, the data-set is in grams.

The standard deviation, both for the sample and the population, in items a and b, will be in grams.
The variance, both for the sample and the population, in items c and d, will be in grams squared.

A similar problem is given at brainly.com/question/14524219

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Two different ways to find the difference for 12-3

Gennadij [26K]

For this case we have:

way 1:
Common factor 3 in the expression:
$12-3 = 3 (4-1)

12-3 = 3 (3)

12-3 = 3 (9)$

Way 2:
Write the number 12 as the sum of 4 times 3:
$12-3 = (3 + 3 + 3 + 3) - 3
$
Then, for associative property:
$12-3 = 3 + 3 + 3 + (3 - 3)

12-3 = 3 + 3 + 3 + (0)

12-3 = 3 + 3 + 3

12-3 = 9$