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3 years ago

What is the difference between measuring by weight and measuring by volume

Mathematics

2 answers:

inn [45]3 years ago

7 0

Mass is the weight of the material.
The volume actually includes the material area.

yaroslaw [1]3 years ago

3 0

The weight is the mass of an object, the volume is usually used to measure the amount of liquid in something.

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The coefficient of determination is mathematically equivalent to the correlation coefficient omega-squared eta-squared both omeg

kvv77 [185]

Answer:

The equivalent expression is $\eta^2$ , because respect to $\omega^2$ the formula is different.

Step-by-step explanation:

The equivalent expression is $\eta^2$ , because respect to $\omega^2$ the formula is different.

$\eta^2$ "describes the ratio of variance explained in the dependent variable by a predictor while controlling for other predictors", similar to the determination coefficient.

One property is that "is a biased estimator of the variance explained by the model in the population" when we are just estimating the size effect.

And other porty is that "measures the variance explained of the sample and not the population" and many times overestimate the effect size.

The formula for is given by:

$\eta^2 = \frac{SSR}{SST}$

Where SST represent the total sum of squares and SSR the sum squares for the regression.

$\omega^2$

This one is a similar estimator to the determination coefficient, but is a estimator with lower bias. And analyze again the variance explained like the determination coefficient and the $\eta^2$

Since have lower bias than $\eta^2$ is prefered, but sometimes is not easy to calculate it. The formula to calculate is given by:

$\omega^2=\frac{SS_{treatment}-(df_{treatment}*MS_{error})}{SS_{total}+MS_{error}}$

There are other estimators like the Cohen's $f^2$ and the Cohen's q who are similar estimators to the variance explained.

6 0

4 years ago

A circle is centered at the vertex of an angle, and the angle's rays subtend an arc that is 86 cm long. 1/360th of the circumfer

rewona [7]

Answer:

Therefore the measure of this angle is $=(\frac{43}{90} )^\circ$

Step-by-step explanation:

Given, a circle is centered at the vertex of an angle and the angle's rays subtend an arc that is 86 cm long.

0.5 cm arc make an angle $\frac{1}{360}$

1 cm arc make an angle $\frac{1}{360\times 0.5}$

86 cm arc make an angle $\frac{86}{360\times 0.5}$

$=(\frac{43}{90} )^\circ$

Therefore the measure of this angle is $=(\frac{43}{90} )^\circ$

6 0

4 years ago

Read 2 more answers

A plumber is laying pipe. His assistant digs a trench in roughly the shape of a rectangular solid measuring 150 ft. in length, 9

Rudik [331]

Volume of trench = Amount of earth removed
Volume of trench = length x width x height = 150 x 12/12 x 9/12 = 150 x 1 x 3/4 = 112.5 cubic feet

Therefore, he removed 112.5 cubic feet of earth.

6 0

3 years ago

Read 2 more answers

Sin Ø = -8/17 and cos Ø = 15/17. Find tan Ø

yaroslaw [1]

Answer:

-8/15

Step-by-step explanation:

So remember what sin, cos, and tan are.

sin = opposite/hypotenuse

cos = adjacent/hypotenuse

tan = opposite/adjacent

Now, using what we know of sin and cos, lets find opposite and adjacent to solve for tan.

Sin=-8/17

So this must mean that opposite is -8, and the hypotenuse is 17.

Next, lets find adjacent. Cos = 15/17

So this must mean that adjacent is 15, and again, hypotenuse is 17.

Now lets take the -8 of the opposite, and 15 of the adjacent, and get tan.

<u>Tan: -8/15. </u>

17 is not included in this whatsoever, since hypotenuse is not included in tan. And remember that it cannot be -15/8, since its opposite/adjacent, not adjacent/opposite.

Hope this helps!

8 0

3 years ago

a person runs at a constant speed of 9.2 miles per hour for 6 minutes and 30 seconds. How far did they travel in yards.

ipn [44]

Given:

Speed $= \bold{9.2 \ \frac{miles}{hour}}$

$\therefore \\\\$

1-hour= 60 minutes

1-minutes=60 second

1-hour= 3600 second

Converting the given time into seconds:

Time= 6 minutes and 30 second

$=\bold{6\times 60 \ second + 30 \ second }\\\\=\bold{360\ second+30\ second}\\\\=\bold{390\ second}\\\\$

When 3600 seconds covers=9.2 miles

Then equation:

$=\bold{\frac{9.2}{3600}}\\\\$

390 seconds covers:

$=\bold{\frac{9.2}{3600}\times 390 \ miles} \\\\$

Let

$\bold{1 \ miles= 1760\ yard}\\\\$

Convert the traveling value into yards:

$=\bold{ \frac{9.2}{3600}\times 390\times 1760}\\\\=\bold{ \frac{9.2}{36}\times 39\times 176}\\\\=\bold{ \frac{9.2}{12}\times 13\times 176}\\\\=\bold{ \frac{9.2}{12}\times 2288}\\\\=\bold{ 9.2\times 190.66}\\\\=\bold{ 1754.072\ yards}\\\\$

Therefore, total traveling yards are"1754.072".

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7 0

3 years ago

Read 2 more answers