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3 years ago

What is the variance of 5, 13, 32, 37, 49, 51, 63

Mathematics

2 answers:

kramer3 years ago

6 0

Answer:

s2 ≈ 438.2383

OverLord2011 [107]3 years ago

5 0

Answer:Variance: 438.2380952380951

Step-by-step explanation:First, I added up all of the numbers:5 + 13 + 32 + 37 + 49 + 51 + 63 = 250

I squared the total, and then divided the number of items in the data set250 x 250 = 62500

62500 / 7 = 8928.57142857143

I took my set of original numbers from step 1, squared them individually this time, and added them all up:(5 x 5) + (13 x 13) + (32 x 32) + (37 x 37) + (49 x 49) + (51 x 51) + (63 x 63) = 11558

I subtracted the amount in step 2 from the amount in step 3:11558 - 8928.57142857143 = 2629.4285714285706

I subtracted 1 from the number of items in my data set:7 - 1 = 6

I divided the number in step 4 by the number in step 5:2629.4285714285706 / 6 = 438.2380952380951

This is my Variance!

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A piece of wood weighing 10 ounces is found to have of 8 ounces after drying . The moisture content was

ollegr [7]

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3 years ago

AB has coordinates A(-5,9) and B(7,- 7). Points P, Q, and I are collinear

VMariaS [17]

Answer:

$\overline{QT}$

Step-by-step explanation:

We want to find the coordinates of a certain point C(x,y) such that C divides $A(x_1,y_1)$ and $B(x_2,y_2)$ in the ratio m:n=3:2

The x-coordinate is given by:

$x=\frac{mx_2+nx_1}{m+n}$

The y-coordinate is given by:

$y=\frac{my_2+ny_1}{m+n}$

AB has coordinates A(-5,9) and B(7,- 7)

We substitute the values to get:

$x=\frac{3*7+2*-5}{3+2}$

$x=\frac{21-10}{5}$

$x=\frac{11}{5}$

and

$y=\frac{3*-7+2*9}{3+2}$

$y=\frac{-21+18}{5}$

$y=-\frac{3}{5}$

Therefore C has coordinates $(\frac{11}{5},-\frac{3}{5})$

The line segment that contains C is $\overline{QT}$

See attachment.

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3 years ago

Using only addition, how do you add eight 8’s and get the number 1000?

prisoha [69]

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3 years ago

Evaluate 4a-3b when a=5 and b=-2

den301095 [7]

4a - 3b

4(5) - 3(- 2)
20 + 6
26

26 is your answer.

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3 years ago

Read 2 more answers

Part 1 - Application Pick one of the two graphs below. Describe a situation which could be modeled by this polynomial graph. Be

Goryan [66]

One good example of a situation that can be modeled by this Polynomial Graph is the price-time relationship between currency pairs being traded on the Foreign Exchange Market.

<h3>What is a Polynomial Graph?</h3>

A polynomial parameter graph is essentially a smooth continuous curve.

Although the forex graph attached has sharp undulations, when regressed and viewed via Polynomial Regression Indicators, they exhibit strong polynomial qualities that meet the requirements of the definition above.

It is to be noted that the Y-Axis is indicative of the price of the currency pairs (which could be any currency against another) and the X-Axis expresses time. See the attached graphs for a better picture.

Learn more about polynomial graphs at:
brainly.com/question/9696642
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2 years ago