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3 years ago

What is the direction and strength of the association between the variable?

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

7 0

<h3>Answer: B) Strong Negative</h3>

The points do not all fall on the same straight line, but they come fairly close to one. This line is known as the line of best fit, aka the regression line. If a regression line has a negative slope, then we consider the data to have negative correlation. The closer the fit, the stronger the correlation.

Contrast this with points that are scattered more randomly about though may have some negative correlation (as x goes up, y goes down). In this scenario, we would have weak correlation. The correlation coefficient r will tell a better story about how strong or weak of a correlation there is. Unfortunately, without the actual numeric values, it's impossible to figure out the r value.

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The force acting on a beam was measured 5 times under the same operating conditions. This process was repeated by 3 observers, r

Akimi4 [234]

Answer:

The Pooled Standard Deviation for these data sets is 1.09

Step-by-step explanation:

Given that;

Standard Deviation 1 = 1.11

Standard Deviation 2 = 0.99

Standard Deviation 3 = 1.15

pooled standard deviation is given as;

$S_{pooled}$ = (n1 - 1 )s1² + ..... + ( nk - 1 )sk² / n1 + ..... + nk - 1

where n1, n2....., nk are the sample sizes of k groups and s1, s2, ....., sk are the standard deviations of k groups respectively

so for the 3 groups;

$S_{pooled}$ ² = (n1 - 1 )s1² + (n2 - 1 )s2² + ( n3 - 1)s3² / n1 + n2 + n3 - 3

we substitute

$S_{pooled}$ ² = (5 - 1 )1.11² + (5 - 1 )0.99 ² + ( 5 - 1)1.15² / 5 + 5 + 5 - 3

$S_{pooled}$ ² = (4.9284 + 3.9204 + 5.29) / 12

$S_{pooled}$ ² = 14.1388 / 12

$S_{pooled}$ ² = 1.1782

$S_{pooled}$ = √1.1782

$S_{pooled}$ = 1.08544 ≈ 1.09

Therefore, The Pooled Standard Deviation for these data sets is 1.09

6 0

3 years ago

20 POINTS! PLZ ANSWER QUICKLY!!!

Lisa [10]

Step 2: m∠p − m∠o = 90 degrees (alternate interior angles) In this step, the student comes up with 90 degrees from nowhere. In addition, there are no alternate interior angles in the diagram because there are no parallel lines.

3 0

3 years ago

What is the area of this polygon? Answer in units

Georgia [21]

Answer:

count everything in the polygon and you will get 37 units square

Step-by-step explanation:

To find the area of a regular polygon, all you have to do is follow this simple formula: area = 1/2 x perimeter x apothem. Here is what it means: Perimeter = the sum of the lengths of all the sides. Apothem = a segment that joins the polygon's center to the midpoint of any side that is perpendicular to that side.

6 0

3 years ago

Evan budgets $2,000 a month to spend on living expenses for his family. Complete the table to express the portion spent on each

Dahasolnce [82]

FOOD:
Fraction = 1/4
Decimal = 0.25
Percent = 25%

RENT:
Fraction = 6/10
Decimal = 0.60
Percent = 60%

TRANSPORT:
Fraction = 3/20
Decimal = 0.15
Percent = 15%

7 0

3 years ago

Read 2 more answers

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this seq

frez [133]

<h3>Answer: 144</h3><h3>Step-by-step explanation:</h3><h3 />

Since, the first 9 multiple of 4 starts from 0 are,

0, 4, 8, 12, 16, 20, ................

Which is an AP,

Having the first term, $a_1 = 0$