All categories

3 years ago

Which of the following would be most likely to yield statistical significant results?

1 answer:

7 0

The correct option is B.
Statistical significant results are those results that are considered not to have occurred by chance, they are believed to have underlying causes for their occurrence. In order to get a statistical significant results, one has to use large data set, which is randomly choose. Large samples are essential in surveying because they provide more accurate mean values and are more representative of the concerned population. Using random sampling helps to reduce the bias that can occur during the sampling exercise. <span />

You might be interested in

Subtract and simplify. Show work please!

ra1l [238]

1) Final expression: $+7y^2-6y-17$

2) Final expression: $21x^3-46x^2+59x-30$

Step-by-step explanation:

The first expression is

$(-2y^2-11y-7)-(-9y^2-5y+10)$

First, we remove the 2nd bracket by changing the sign of all the terms inside:

$-2y^2-11y-7-+9y^2+5y-10$

Now we group the terms with same degree together:

$(-2y^2+9y^2)+(-11y+5y)+(-7-10)$

Now we solve the expression in each brackets:

$(-2y^2+9y^2)+(-11y+5y)+(-7-10)=\\+7y^2-6y-17$

So, this is the final expression.

The second expression is

$(7x-6)(3x^2-4x+5)$

We apply the distributive property, so we rewrite the expression as follows:

$(7x-6)(3x^2-4x+5)=7x(3x^2-4x+5)-6(3x^2-4x+5)$

Solving both brackets,

$7x(3x^2-4x+5)-6(3x^2-4x+5)=\\21x^3-28x^2+35x-18x^2+24x-30$

Now we group terms of same degree together:

$21x^3-28x^2+35x-18x^2+24x-30=\\21x^3+(-28x^2-18x^2)+(35x+24x)-30$

And solving each bracket,

$21x^3+(-28x^2-18x^2)+(35x+24x)-30=\\21x^3-46x^2+59x-30$

So, this is the final expression.

Learn how to simplify expressions:

brainly.com/question/7014769

brainly.com/question/11007572

brainly.com/question/11334714

#LearnwithBrainly

3 0

3 years ago

I need some help on this if possible

Sophie [7]

where C is the circumference, d is the diameter and r is the radius.

The diameter of a circle is a line segment that passes through the center of the circle and has its endpoints on the circle. The radius of the circle is a line segment from the center of the circle to a point on the circle. The diameter of a circle is twice the length of its radius.

If you are given the diameter then use the formula C = πd

If you are given the radius then use the formula C = 2πr

Step-by-step explanation:

4 0

3 years ago

Need help asap!! Tysmm

Levart [38]

Answer:

1) 9x-4

Step-by-step explanation:

7x+2x= 9x

-8+4= -4

9x-4

8 0

3 years ago

Read 2 more answers

Hey can you please help me posted picture of question

frutty [35]

The answer is C and E

6 0

3 years ago

Read 2 more answers

In the Diagram, DEC is a ____ of ABC across line k.

IRISSAK [1]

Answer:

Reflection

Step-by-step explanation:

A reflection is a mirrored image of a shape. Notice how DEC seems to be a "flipped" version of ABC, hence a mirrored image.

Cheers.

5 0

3 years ago