All categories

3 years ago

Use the table. Which inference can you make by comparing the measures of center?

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

3 0

Answer: the average speed of the runners increased since last year.

Step-by-step explanation:

The table is:

Mean MAD

Last Year 16.2 s 1.2

This Year 14.7 s 1.9

Looking at this table we can see that this year, the mean time is smaller than the one from last year, so the runners are faster in average.

The mean absolute deviation is bigger, but the change in the mean is bigger.

difference of the mean 16.2 - 14.7 = 1.5

difference of the MAD 1.9 - 1.2 = 0.7

This means that the average speed of the runners increased since last year, and the fact that the MAD increased means that not all the runners increased their speed at the same rate, so now the speeds of the different runners are not as alike like last year.

You might be interested in

$49.95 CD player; 5% discount

velikii [3]

Because there is no actual question, I'll just tell you relevant information, the discount is worth approximately $2.50 and the price of the CD player is 47.45

5 0

4 years ago

Whats happenin playas'

Doss [256]

Answer:

nothing, I just want free points!

thx

6 0

4 years ago

Read 2 more answers

What is 25% of 40 people.

Jlenok [28]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

In Exercise, find the derivative of the function.<br> y = ln(3 + x2)

erastovalidia [21]

Answer: $\dfrac{2x}{3 + x^2}$

Step-by-step explanation:

We know the property of derivative: $\dfrac{d}{dx}(\log (x))=\dfrac{1}{x}$

Given function : $y=\ln(3 + x^2)$

Differentiate both sides with respect to x , we get

$\dfrac{dy}{dx}=\dfrac{d}{dx}(\ln(3 + x^2))$

$\Rightarrow\ \dfrac{dy}{dx}=\dfrac{1}{3 + x^2}\cdot\dfrac{d}{dx}(3 + x^2)$ [By Chain rule]

$\Rightarrow\ \dfrac{dy}{dx}=\dfrac{1}{3 + x^2}\cdot(0+2x)$

[Since $\dfrac{d}{dx}(a)=0$ , where a is scalar and $\dfrac{d}{dx}(x^n)=n(x)^{n-1}$ ]

$\Rightarrow\ \dfrac{dy}{dx}=\dfrac{2x}{3 + x^2}$

Hence, the derivative of the given function is $\dfrac{2x}{3 + x^2}$ .

5 0

4 years ago

Which of the following is the rule for rotating the point with coordinates (x,y), 180° clockwise about the origin? A. (x,y)→(y,−

bogdanovich [222]

Hey there! I'm happy to help!

If you reflect a point across the x-axis, you have (x,y)⇒(x,-y). If you reflect across the y-axis, you have (x,y)⇒(-x,y). A 180° rotation is the same thing as reflecting across both the x and y axes. This means that the rule for rotating the point with coordinates (x,y) 180° clockwise about the origin is D. (x,y)⇒ (-x,-y).

Have a wonderful day! :D

6 0

3 years ago