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Alinara [238K]
3 years ago
5

The data set on the right represents . Which formula should be used to calculate the variance? A teacher recorded all of his stu

dents’ grades on the final exam as: 62, 77, 78, 80, 82, 82, 83, 84, 85, 87, 89, 95 Consider the formulas: A: s squared = StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1. B: s = StartRoot StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1 EndFraction EndRoot. C: Sigma squared = StartFraction (x 1 minus mu) Squared + (x 2 minus mu) squared + ellipsis + (x N minus mu) squared Over N EndFraction. D: Sigma = StartRoot StartFraction (x 1 minus mu) Squared + (x 2 minus mu) squared + ellipsis + (x N minus mu) squared Over N EndFraction EndRoot
Mathematics
1 answer:
BARSIC [14]3 years ago
7 0

Answer:The data set on the right represents the population.

Step-by-step explanation:

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mulltiply

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3 years ago
A box contains 2 dozen pairs of contact lenses ,of which 8 pairs are tinted. A pair of contact lenses is drawn at random from th
tia_tia [17]

Answer:

\dfrac{2}{3}.

Step-by-step explanation:

It is given that a box contains 2 dozen pairs of contact lenses ,of which 8 pairs are tinted.

1 dozen = 12 units

Total pairs of contact lenses =2\times 12 = 24

Tinted pairs of contact lenses = 8

Pairs of contact lenses not tinted = 24 - 8 = 16

If a pair of contact lenses is drawn at random from the box, then we need to find the probability that it is not tinted.

P(\text{Not tinted})=\dfrac{\text{Pairs of contact lenses not tinted}}{\text{Total pairs of contact lenses}}

P(\text{Not tinted})=\dfrac{16}{24}

P(\text{Not tinted})=\dfrac{2}{3}

Therefore, the required probability is \dfrac{2}{3}.

4 0
3 years ago
The equation below describes a proportional relationship between x and y. What is the constant of​ proportionality? y=3/5x The c
svetoff [14.1K]

Answer:inversely proportional

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As the value of x increase the value of y decrease

4 0
2 years ago
Solve for k:<br><br> k + 6 &gt; -37
Zina [86]

Answer:

\sf k + 6 > -37

\sf k+6-6>-37-6

\boxed{\sf k>-43}

5 0
2 years ago
Read 2 more answers
Distance Formula D=√(x2-x1)² + (y2 - y₁) ² a. 8.149 b. 8.84 c. 9.438 d.12.369 ​
lakkis [162]

Answer:

d

Step-by-step explanation:

using the distance formula

d = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

with (x₁, y₁ ) = (- 2, 4 ) and (x₂, y₂ ) = (10, 1 )

d = \sqrt{10-(-2))^2+(1-4)^2}

   = \sqrt{(10+2)^2+(-3)^2}

  = \sqrt{12^2+9}

  = \sqrt{144+9}

  = \sqrt{153}

  ≈ 12.369

5 0
2 years ago
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