3 years ago

Find the variance of the given data rounded to the nearest hundredth 3,4,5,7,10,12,15

Mathematics

1 answer:

True [87]3 years ago

4 0

Answer:

(3 + 4 + 5 + 7 + 10 + 12 + 15)/7 = 8

(3^2 + 4^2 + 5^2 + 7^2 + 10^2 + 12^2 + 15^2)/7 - 8^2 = 17.14285714

You might be interested in

I need this done:'( please

NISA [10]

Hey! When you ask a question there is a math equation option. Use that to scan the problem and it will give you your answer.

3 0

2 years ago

Write the word or phrase that best completes each statement or answers the question.

aniked [119]

I believe that the answer is A

5 0

3 years ago

Alvin's age is three times elga's age. the sum of their ages is 32 . what is elga's age

jeyben [28]

Alvin is 24 and Elga is 8. sorry I'm late

6 0

3 years ago

Which of the following ordered pairs is a solution of x + 1/2 y = 1?

ololo11 [35]

X+y/2=1
-2+6/2=1

-2 + 3 =1 true

⇒ ( -2, 6) is the solution

6 0

2 years ago

What is -3×^2+1467x-86940=0 ?

frozen [14]

For this case we must solve the following quadratic equation:

$-3x ^ 2 + 1467x-86940 = 0$

If we divide both sides of the equation by 3 we have:

$-x ^ 2 + 489-28980 = 0$

The solutions will come from:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2 (a)}$

Where:

$a = -1\\b = 489\\c = -28980$

Substituting:

$x = \frac {-489 \pm \sqrt {(489) ^ 2-4 (-1) (- 28980)}} {2 (-1)}\\x = \frac {-489 \pm \sqrt {239121-115920}} {- 2}\\x = \frac {-489 \pm \sqrt {123201}} {- 2}\\x = \frac {-489 \pm351} {- 2}$

The roots are:

$x_ {1} = \frac {-489 + 351} {- 2} = \frac {-138} {- 2} = 69\\x_ {2} = \frac {-489-351} {- 2} = \frac {-840} {- 2} = 420$

ANswer:

$x_ {1} = 69\\x_ {2} = 420$

5 0

2 years ago