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3 years ago

Find the standard deviation of the words per page. 10 15 8 16 14 12 9 12 14 10

Mathematics

2 answers:

Vanyuwa [196]3 years ago

3 0

Answer:

Standard deviation = 2.569

Step-by-step explanation:

The mean = (10 + 15 + 8 + 16 + 14 + 12 + 9 + 12 + 14 + 10) ÷ 10 = 12

x - mean = -2 , 3 , -4 , 4 , 2 , 0 , -3 , 0 , 2 , -2

(x - mean)² = 4 , 9 , 16 , 16 , 4 , 0 , 9 , 0 , 4 , 4

Σ(x - mean)² = 4 + 9 + 16 + 16 + 4 + 0 + 9 + 0 + 4 + 4 = 66

Standard deviation = √(66/10) = 2.569

yaroslaw [1]3 years ago

3 0

Answer:

standard deviation = 2.56 .

Step-by-step explanation:

We have to find the standard deviation of :

10, 15, 8 ,16, 14, 12, 9,12, 14, 10

The formula to find standard deviation is:

S.D = ∑(x-mean)² / n where n is total number of values.

The mean is the sum of total values divided by the number of values.

The mean=( 10+ 15+8 +16+14+ 12+ 9+12+ 14+ 10) / 10 = 12

(x- mean) = -2 , 3 ,-4 , 4 , 2 , 0 , -3 , 0 , 2 , -2 .

(x- mean)² = 4, 9,16, 16, 4, 0, 9, 0, 4, 4.

∑(x- mean)² = 4+9+16+ 16+4+ 0+ 9+0+ 4+ 4= 6

n = 10

Putting values in formula, we have

standard deviation =√66/10

S.D= 2.56 which is the answer.

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gtnhenbr [62]

Answer:

a) 0.5476

b) 0.0676

c) 0.4524

Step-by-step explanation:

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If you own two cars, the probability that:

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We need that car 1 won't need repair AND car 2 won't need repair.

=P(Car 1 doesn't need repair) x P(Car 2 doesn't need repair)

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The probability that neither will need repair is 0.5476.

b) Both will need repair:

We need that car 1 needs repair AND car 2 needs repair.

P(Car 1 needs repair) x P(Car 2 needs repair)

= 0.26 x 0.26 = 0.0676

The probability that both will need repair is 0.0676

c) At least one car will need repair

Car 1 needs repair or Car 2 needs repair or both need repair.

To solve this one, it's easier to use the complement of P(neither needs repair)

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3 years ago

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4 years ago

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___________________________________________

Hope that helped. Good luck.

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3 years ago

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