Compute the sample variance for the following scores: 25, 36, 41, 28, 29, 32, 39, 37, 34, 34, 37, 35, 30, 36, 31, 31

Answers

Answer 1

Answer:

Step-by-step explanation:

From the given information:

The mean [tex]\hat x = \dfrac{\sum x}{n}[/tex]

[tex]\hat x = \dfrac{25+36+41+28+29+32+29+37+34+34+37+35+30+36+31+31}{16}[/tex]

[tex]\overline{x} = \dfrac{535}{16}[/tex]

[tex]\overline{x} = 33.44[/tex]

The sample variance is as follows:

[tex]S^2 = \dfrac{\sum dx^2 - ( \dfrac{\sum dx)^2}{n} )}{n-1}[/tex]

[tex]S^2 = \dfrac{279- ( \dfrac{7}{15} )^2}{15}[/tex]

[tex]S^2 = 18.585[/tex]


Related Questions

multiply (-18)(-13) its for usatestprep

Answers

Answer:

Step-by-step explanation:

Here you go mate

Step 1

(-18)(-13)  Equation/Question

Step 2

(-18)(-13)  Multiply

234

Answer

234

I need help Im helping my lil sis but im to lazy to help her out so can someone answer?
Shelly ate 7/10 of the gummy worms and Max ate 11/100

Answers

Answer: ok it is 81/100.

Step-by-step explanation:Just add them together which gives you 81/100 .chnage 7/100 to 70/100 then combine 11/100 which equals 81/100.

:)

The blue dot is at what value on the number line? -10 -16

PLEASE ANSWER NOW!!!!

Answers

Answer:

- 22

because if you add 6 more to 16 the answer will be -22

HELPPP I NEED HELP DUE VERY SOONNN

Answers

Answer:

x .  1 .  3  .  5  .  7  .  9

y . 6 . 18 . 30 . 42 . 54

Step-by-step explanation:

X-values are the odd numbers

Y-values are the corresponding x-values multiplied by 6

Which table matches the rule “subtract 4 from the input number"?
Input 8 9 10 13
Output 12 13 14 17
А
Input 12 13 14 17
Output 8 9 10 13
B
Input 8 9 10 13
Output 14 15 16 17
Input 12 15 16 19
Output 8 9 10 13

Answers

Answer:

B

Step-by-step explanation:

You just subtract it by 4. 12-4=8 etc.

I really need help please

Answers

Answer:

-16y-6

=2(-8y-3)

2x (-8y)= -16y

2x(-3) = -6

Answer:

1) -8y

2) -3

Hope this helps!

Rewrite the expression 13d - (-9d - 4) without parentheses.

Answers

Answer: 13d+9d+4

hope this helps! <3

Write this number in standard form.

Seven million one thousand forty-eight

Answers

7,001,048 is the correct number. have a great day :))

The standard form of the number 'Seven million one thousand forty-eight' will be;

⇒ 7,001,048

What is Number system?

A system of writing to express the number is called number system.

We have to given that;

The number is,

'Seven million one thousand forty-eight'

Now,

Since, The number is,

'Seven million one thousand forty-eight'

Hence, The standard form of the number = 7,001,048

Thus, The standard form of the number 'Seven million one thousand forty-eight' is 7,001,048.

Learn more about the number system visit:

https://brainly.com/question/17200227

#SPJ2

What is the y-intercept
of this line?
please help asap

Answers

Answer: 9 because of the (0,9)

Step-by-step explanation:

Given the figure below, which of the following points name a line segment, a line, or a ray?



point B and point C
point A and point C
point D and point A
point E and point A

Answers

Answer:

Point a and point c

i dont know anything else

Answer:

a and c

Step-by-step explanation:

plz give me brainliest

Pythagorean’s theorem

Answers

Step-by-step explanation:

Given

Hypotenuse (h) = 7

base (b) = 4

perpendicular (p) =?

Using Pythagoras theorem we get,

p = √h² - b²

= √7² - 4²

= √33

= 5.74

Hope it will help :)❤

p = a

a = 5.74 or u can write

a = √33

Answer:

5.74

Step-by-step explanation:

a=?

b=4

c=7

a^2=c^2-b^2

=7^2-4^2

=49-16

=33

a=√33

a=5.74

If the equation of a line is 4x + 4y = 1 and equation of a second line is x + y = -8 which of the following is true

Answers

Answer:

Step-by-step explanation:

Two lines are perpendicular. The equation of the first line is y = 4x + 1. Which of the following cannot be the equation of the second line? A. y = -1/4x -2 B. x - 4y = -2 C. x + 4y = 2 D. 8y = -2x - 5

A Jaguar XJ220 is 41 mph slower than a
Bugatti Veyron, which can travel 253 mph.
How fast does the Jaguar XJ220 travel

Answers

Answer:

212mph

Step-by-step explanation:

253-41=212

HELP NOW PLZ U GET POINTS!!!

Answers

Answer:

3

is the answer

Answer:

3

Step-by-step explanation:

3
45 X
Pleaseee help meeee

Answers

Answer:

135..........................

Answer: 45*3= 135

135 is the answer for 45*3.

It is estimated that 75% of the students at Ryder Middle School are involved in athletics or
band. Which decimal represents the number of students involved in athletics or band?
A 0.075
B 0.75
C 7.5
D 75.00

Answers

B is the right answer

Find two ratios equivalent to the ratio in Exercise 1.

Answers

Answer:

12:26,   24:52 :D

Determine the value of x.
Question 19 options:
A) 44.78

B) 70.57

C) 3.22

D) 0.02

Answers

Answer:

A) 44.78

Step-by-step explanation:

20 POINTS AND BRAINLIEST FOR CORRECT!!!!


3 1/3 OF 10

Answers

Answer:

33.333333333

Step-by-step explanation:

simply turn 3 1/3 into an improper fraction by multiplying the denominator by the coefficient and adding the numerator to get 10/3, which simplifies to 3.3333 and multiply it by 10 and you get 33.3333.

I will mark you brainliest

Answers

Answer:

[tex](15s)^6[/tex] is the same as [tex]15^6[/tex] × [tex]s^6[/tex]

The above statement can be proven by a rule related to exponents that states: [tex](ab)^c = a^c[/tex] × [tex]b^c[/tex]

[tex]3s^4[/tex] × [tex]5s^2[/tex] = [tex]15s^6[/tex]  

(Work for the equation above ---> You would multiply the 3 and 5 together (3 x 5 = 15) and then multiply the s terms together [tex]s^4[/tex] x [tex]s^2[/tex] , and this can be done using the exponent rule --> [tex]a^b[/tex] x [tex]a^c[/tex] = [tex]a^{b+c}[/tex]. This means that [tex]s^4[/tex] x [tex]s^2 = s^{4+2} = s^6[/tex]) This results in [tex]15s^6[/tex]

[tex]15s^6 \neq 15^6[/tex] x [tex]s^6[/tex]

Hope this helps in any way!! :D


[tex] {x}^{4} - 17x ^{2} + 16[/tex]
factor completely​

Answers

Answer:

[tex] \underline{{x}^{4} - 17 {x}^{2} + 16} \\ {x}^{4} - {x}^{2} - 16 {x}^{2} + 16 \\ {x}^{2} ( {x}^{2} - 1) - 16( {x}^{2} - 1) \\ ( {x}^{2} - 1)( {x}^{2} - 16) \\ \boxed{(x - 1)(x + 1)( x - 4)(x + 4)}✓[/tex]

(x-1)(x+1)(x-4)(x+4) is the right answer.

HELP ASAP-The girls’ soccer team won 80% of its games this season. They won 12 games. -The boys’ soccer team won 70% of its games this season. They won 14 games. How many games did each soccer team play this season?

Answers

Answer:

12 and 14

Step-by-step explanation:

15 - 20% = 12

20 - 30% = 14

ez

Jason buys 2 baseball bats for $300. What is the unit rate per bat?
A. $100
B. $125
C. $140
D. $150

Answers

Answer:

Step-by-step explanation:

if 2 baseball bats costs 300

one will cost

300/2=150

Answer:

150 if tax is not present.

Step-by-step explanation:

Locate and classify all the critical points of the function. (If an answer does not exist, enter DNE.)

f(x, y) = 2x² + 3y² + 4

Answers

Answer:

Step-by-step explanation:

f(x,y)=2x2+3y2−4x−1 ⇒ ∇f =⟨4x−4,6y⟩=⟨0,0⟩ ⇒ x=1, y = 0. Thus (1,0) is the only critical point of f, and it lies in the region x2+y2<16.Ontheboundary,g(x,y)=x2+y2=16 ⇒ λ∇g=⟨2λx,2λy⟩,so6y=2λy ⇒ eithery=0orλ=3. Ify=0,then x=±4;ifλ=3,then4x−4=2λx ⇒ x=−2andy=±2√3. Now f(1,0) = −3, f(4,0) = 15, f(−4,0) = 47, and f−2,±2√3 = 51. Thus the maximum value of f(x,y) on the disk x2+y2 ≤ 16 is f−2,±2√3 = 51, and the minimum value is f (1, 0) = −3.

6 in
4 in
4 in.
What is the surface area of the right square pyramid?

Answers

Answer:

48in

Step-by-step explanation:

6 x 4 x 4

96

divide it by 2

48

Answer:

48

Step-by-step explanation:

grhgbfjsbrvgjxbwifbcozbwicovbsnw

A rectangular bedroom is 3 ft longer than it is wide. Its area is 270 ft2. What is the width of the room?

Answers

15 ft wide. 15 X 18 is 270 and 18-15 is three.

If point C is the circumcenter, find each missing value(picture attached)

Answers

Answer:

is this a test > : (

Step-by-step explanation:

Answer:

f

Step-by-step explanation:

what is the complement of rolling a 3 on a die

Answers

Answer:

Part of a train timetable is shown.

Aberystwyth

Shrewsbury

Birmingham

08 30

10 17

12 30

14 19

13 55

16 05

17 20

a)

Bob catches the 12 30 train from Aberystwyth. He arrives in Shrewsbury 8 minutes late. What time does he arrive in Shrewsbury?

b) How long is Bob's journey from Aberystwyth to Shrewsbury? Give your answer in minutes.

minutes

11 30

15 30

Judy catches the 12 30 train from Aberystwyth.

She arrives in Shrewsbury on time.

She attends a job interview.

She gets back to Shrewsbury station 1 hour and 50 minutes later. Is she back in time to catch the 16 05 train to Birmingham?

You must show your working.

The price paid for a $4.50 pen after a 60% discount is applied​

Answers

Answer:

1.80

Step-by-step explanation:

trust me 100% sure

The awnser should be 1.80

Builder’s Warehouse has a clearance on overstocked merchandise. A picnic table that usually sells for $167 is on sale for $149. What is the markdown?

Answers

167-149= The answer is 18

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