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3 years ago

What is true about Kira’s data collection ?

Mathematics

2 answers:

steposvetlana [31]3 years ago

8 0

is there a pic for this

gayaneshka [121]3 years ago

8 0

If there a picture , or more explanation it could be answered sooner.

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The scores of the quizzes of five students in both English and Science are:

vredina [299]

Answer:

0.23

Step-by-step explanation:

Given the data:

____(x) __(y)__(x - m1) /s1 ___(y-m2) /s2

1 ___6 ___8__ - 0.2 _______0.625

2 __5 ___ 5__ - 0.7________ - 1.25

3 __9____6__ 1.3 ________ - 0.625

4__ 4____ 7__ - 1.2 ______ 0

5__ 8 ____9 _ 0.8 _______ 1.25

For English :

Mean score(m1) = 6.4

Standard deviation (s1) = 2.0

For Science :

Mean score (m2) = 7.0

Standard deviation (s2) = 1.6

n = number of observations = 5

Correlation Coefficient (r) :

r = 1/(n - 1) Σ[((X - m1) / s1) * ((Y - m2) /s2)]

(-0. 2 * 0.625) + (-0.7 * - 1.25) + (1.3 * - 0.625) + (-1.2 * 0) + (0.8 * 1.25) = 0.9375

r = 0.9375/(5-1)

= 0.234

= 0.23

6 0

3 years ago

Which ordered pair is NOT a solution to the inequality in the graph?

aalyn [17]

Given:

The inequality is

$y\leq 3x+2$

To find:

The ordered pair that is NOT a solution to the inequality in the graph.

Solution:

We have,

$y\leq 3x+2$

Checking the inequality for (0,0), we get

$0\leq 3(0)+2$

$0\leq 2$

So, the equality is true for (0,0). it means (0,0) is a solution of given inequality.

Checking the inequality for (-2,-4), we get

$-4\leq 3(-2)+2$

$-4\leq -6+2$

$-4\leq -4$

So, the equality is true for (-2,-4). It means (-2,4) is a solution of given inequality.

Checking the inequality for (0,2), we get

$2\leq 3(0)+2$

$2\leq 2$

So, the equality is true for (0,2). It means (0,2) is a solution of given inequality.

Checking the inequality for (-3,4), we get

$4\leq 3(-3)+2$

$4\leq -9+2$

$4\leq -7$

This statement is not true. So, the equality is false for (-3,4). It means (-3,4) is not a solution of given inequality.

Therefore, the correct option is D.

6 0

3 years ago

Read 2 more answers

How did planetesimals form (Not really math xD)

Andreyy89

Condensation, the process of forming solid particles from the solar nebula, is an early process in the formation of a planetesimal, an early solar system body of small to medium size that combines with other planetesimals to form protoplanets
HOPE THIS HELPED

3 0

4 years ago

The following statements are made about some number: a) It is prime b) It is odd number and less than 5 c) It is an even number

rusak2 [61]

a) It is prime - 2, 3
b) It is odd number and less than 5 - 1, 3,
c) It is an even number - 2,4
d) It is 3

If a) and c) is true, then Number is 2. 2 is prime and 2 is even.
b) and c) is false.

3 0

3 years ago

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I need help with number 4

Veronika [31]

Answer:

21 girls

Step-by-step explanation:

Boys: girls

5:7

Multiply each number by 3

15: 21

There will be 15 boys and 21 girls

4 0

3 years ago

Read 2 more answers