3 years ago

What is -1/9 + 2/9 equal to

Mathematics

2 answers:

Orlov [11]3 years ago

7 0

Answer:

1/9

Step-by-step explanation:

stich3 [128]3 years ago

5 0

Answer:

1/9

Step-by-step explanation:

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Step-by-step explanation:

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Option B.

Step-by-step explanation:

The given data set is

34, 35, 41, 28, 26, 29, 32, 36, 38, 40

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Number of observations, n = 10

Mean of the data is

$Mean=\dfrac{\sum x}{n}$

$Mean=\dfrac{34+35+41+28+26+29+32+36+38+40}{10}$

$Mean=\dfrac{339}{10}$

$Mean=33.9$

Formula for mean deviation is

$\text{Mean deviation}=\dfrac{\sum |x-mean|}{n}$

$\sum |x-mean|=|34-33.9|+|35-33.9|+|41-33.9|+|28-33.9|+|26-33.9|+|29-33.9|+ |32-33.9|+|36-33.9|+|38-33.9|+|40-33.9|=41.2$

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The mean deviation of the ratings is 4.12.

Therefore, the correct option is B.

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