Answers
Answer: Choice D)
He needs to square each deviation in the numerator.
==========================================================
Explanation:
The sample standard deviation involves these steps
Find the sample mean xbar.Subtract the xbar value from each data point. This gets us the list of deviations or how far each person is from the mean.Square each difference in the previous stepAdd up the squares from step 3. This is referred to as the Sum of the Squared Errors (SSE)Divide the SSE over n-1. If Toby was doing a population standard deviation, then he'd divide over n instead of n-1. However in much of statistics, we don't know much about a population and instead rely on sample statistics.The result of step 5 gets the variance. Apply the square root to the variance to get the standard deviation.The step 3 highlighted in bold is where Toby made an error. He subtracted xbar from each person correctly, but forgot to square those deviations. The squaring is done to ensure we don't have any negative deviations.
This is what his work should look like when calculating the sample standard deviation
[tex]s = \sqrt{\frac{(6-7)^2 + (5-7)^2 + (9-7)^2 + (8-7)^2}{3}}[/tex]
Related Questions
help? i will give brainliest
Answers
Answer: line is never ending in both directions
ray is never ending in one direction
Step-by-step explanation:
I need help !!!!
Gene says that -2 1/8 is less than -2.25 is he correct explain your answer !
Answers
Evaluate.
4⋅(4+(2^6⋅2^−3) )
A. 48
B. 24
C. 12
D. 2
Answers
Answer:
4+(64x1/8)=4+8=12
[tex]4 \times (4 + ( {2}^{6} \times {2}^{ - 3})) = [/tex]
[tex]4 \times (4 + ( {2}^{6 - 3})) = [/tex]
[tex]4 \times (4 + ( {2}^{3} )) = [/tex]
[tex]4 \times (4 + (8)) = [/tex]
[tex]4 \times (4 + 8) = [/tex]
[tex]4 \times (12) = 48[/tex]
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The correct answer is (( A )) .
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The following histogram represents the number of hours students practice each week for the band.
How many hours did most students practice?
a. 7-8
b. 1-2
c. 3-4
d. 5-6
Best answer gets brainliest!
Answers
Answer:
D
Step-by-step explanation:
frequency is the students and most of them (10) study 5-6 hours ♡
A two digits number is seven times the sum of its digits . The number formed by reversing the digits is 18 less than the original number. Find the number .
Answers
Hey there!
10x+y=7(x+y)=7x+7y
or 10x−7x=7y−y
or 3x=6y
or x=2y ........(1)
Number formed by reversing the digits is yx, i.e.,
10y+x=10x+y−18
Substituting x=2y, we get
10y+2y=10×2y+y18
or 2y=21y−18
or 21y−12y=18
or 9y=18
or y=2
∴x=2y=2×2=4
Therefore, the number is 42.
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Let the two digit number be ' xy '
where, x is the ten's place digit, and y is one's place digit, now let's proceed further ~
The origin number can be written as :
[tex]\qquad \sf \dashrightarrow \: 10x + y[/tex]
[ because x is at ten's place ]
of the digits are swapped, the new number will be :
[tex]\qquad \sf \dashrightarrow \: 10y + x[/tex]
According to conditions provided in the question : -
[tex]\qquad \sf \dashrightarrow \: 10x + y = 7 \times (x + y)[/tex]
[tex]\qquad \sf \dashrightarrow \: 10x + y = 7x + 7y[/tex]
[tex]\qquad \sf \dashrightarrow \: 10x - 7x + y - 7y= 0[/tex]
[tex]\qquad \sf \dashrightarrow \: 3x - 6y = 0 \: \: \: \: \: \: [/tex]
[tex]\qquad \sf \dashrightarrow \: x - 2y = 0 \: \: \: \: \: \: - (1)[/tex]
here we got our first equation, let's find the other one ~
[tex]\qquad \sf \dashrightarrow \: (10x + y) - 18= 10y + x[/tex]
[tex]\qquad \sf \dashrightarrow \: 10x - x + y - 10y = 18[/tex]
[tex]\qquad \sf \dashrightarrow \: 9x - 9y = 18[/tex]
[tex]\qquad \sf \dashrightarrow \: x - y = 2 \: \: \: \: \: \: - (2)[/tex]
we got our second equation ~
Now it's time to subtract equation (1) from equation (2) :
[tex]\qquad \sf \dashrightarrow \:( x - y ) - (x - 2y)= 2 - 0[/tex]
[tex]\qquad \sf \dashrightarrow \: \cancel{x }- y - \cancel{x} + 2y= 2 - 0[/tex]
[tex]\qquad \sf \dashrightarrow \: y= 2 [/tex]
hence, value of y is 2, use this value in equation (2) to find x ~
[tex]\qquad \sf \dashrightarrow \: x - y= 2 [/tex]
[tex]\qquad \sf \dashrightarrow \: x - 2= 2 [/tex]
[tex]\qquad \sf \dashrightarrow \: x = 4 [/tex]
Therefore, the required number is xy = 42
I need help. I don't know how to solve this
Answers
Answer:
30
Step-by-step explanation:
So you do 4 x 2 for the top square, 2 x 6 for the middle square, and 6 x 2 for the bottom square and then add it all up. Hope this helps!
Your friend has a recipe book with 1,000 recipes. She wants to try two new recipes each week. What fraction of the recipes in the book will she have tried after 1 year?
Answers
Answer:
104/1000
Step-by-step explanation:
If she tries two each week you will need to know how many weeks are in a year.Now about 52 weeks are in a year so you would multiply 52 by 2 and get 104.
Here, we need to find the fraction of recipes she would have tried in the book after 1 year
The fraction of recipes she would have tried in the book after 1 year is 13/125
Total recipes in the book
[tex] = \frac{Total recipe she tried in a year}{Total recipes in the book } [/tex]
= 1,000
Recipe tried each week = 2
Find the fraction of recipe she would have tried after 1 year
There are 52 weeks in 1 year
she tried 2 recipes each week
Total recipe she tried in a year
=
[tex] = total \: number \: of \: weeks \: in \: a \: year \: \times number \: of \: recipe \: tried \: per \: week[/tex]
[tex] = 52 \times 2[/tex]
[tex] = 104[/tex]
fraction of recipe she would have tried after 1 year
[tex] = \frac{Total recipe she tried in a year}{Total recipes in the book } [/tex]
= [tex] \frac{104}{1000} [/tex]
Divide by 8
= 13/125
Read more:
https://brainly.in/question/39091669
16 is what percent
of 20?
Answers
Answer:
80%
Step-by-step explanation:
Answer:
The answer is 1=5% so 5 × 16 = 80
2x + y = 2
-3x + y = 4
Transfer these into y=mx+b
Answers
Step-by-step explanation:
2x + y = 2 subtract 2x from both sides
2x - 2x + y = 2 - 2x
y = -2x + 2
(m = -2, b = 2)
-3x + y = 4 add 3x to both sides
-3x + 3x + y = 4 + 3x
y = 3x + 4
(m = 3, b = 4)
What is the domain of the given relation (1, 2), (8, 15), (-3, 11),
(-15, 85)?
Answers
Answer:
1,8,-3,-15
Step-by-step explanation:
Mathhhhhh helpieeeeee please.
Answers
Answer:
vertical angles - angle 2 and 4, angle 1 and 3
adjacent angles- angle 2 and 3, angle 1 and 4
When a LINE SEGMENT is reflected over a line of symmetry, what is changing?
A. The LENGTH of the line segment
B. The DISTANCE of the line segment from the line of symmetry
C. The coordinates of the ENDPOINTS of the segment
Answers
Answer:
The correct answer would be C. The coordinates of the ENDPOINTS of the segment
Step-by-step explanation:
It cannot be A, because the segment only moves. It does not change size.
It cannot be B, because the line of symmetry goes down the middle of the segment- the distance remains the same.
Therefore it is C. The coordinates of the ENDPOINTS of the segment
What is the distance between the points (-6.5) and (8,-2) on a coordinate plane?
Answers
Answer:
5√7 or 15.652
Step-by-step explanation:
is the numbers (-6,5) (8-2) or is it (-6.5) because of it's -6.5 i do not understand how to get that answer (-6,5) the answer is 5√7
Which would be a correct step when evaluating this equation?
-6-(-16)=
Answers
Answer:
10
Step-by-step explanation:
[tex]\mathrm{Apply\:rule}:\quad \:a-\left(-b\right)=a+b[/tex]
[tex]-6-\left(-16\right)=-6+16[/tex]
[tex]=-6+16[/tex]
[tex]\mathrm{Add\:the\:numbers:}\:-6+16=10[/tex]
Hence, Answer = 10
~Lenvy
6) Andy is going kyacking. He has $341 to spend on parking and paddles. Parking costs $30 and paddles cost $45. 20 per person. Determine how many people can go kyacking
Answers
Eight times a number is the same as 30 less than 5
times the number. Find the number?
Answers
Answer:
2.30
Step-by-step explanation:
A una persona le ofrecieron dos trabajos de vendedor. En la empresa A, le ofrecieron al mes un sueldo base de $6 000 más una comisión de $20 por cada pieza vendida. En la empresa B, le ofrecieron el mismo sueldo base más una comisión igual al cuadrado de la cantidad de piezas vendidas. ¿A partir de qué cantidad de piezas vendidas en un mes le pagan más en la empresa B que en la A?A.
15
B.
19
C.
20
D.
21
Answers
Concluimos que a partir de 21 piezas se gana más en la empresa B.
¿Cuanto debe vender para que le paguen más en la empresa B?
Si definimos el número de piezas vendidas como x, la cantidad que le pagan en la empresa A es:
A(x) = $6000 + $20*x
Y lo que le pagan en la empresa B es:
B(x) = $6000 + x^2
Queremos ver para que valor de x, se da que B(x) > A(x).
Entoces resolvamos esa inequación.
6000 + 20*x < 6000 + x^2
20x < x^2
20 < x
x debe ser más grande que 20, entonces concluimos que a partir de 21 piezas se gana más en la empresa B.
Sí quieres aprender más sobre inecuaciones, puedes leer:
https://brainly.com/question/23023694
Which equation can be used to find the measure of angle FGE?
sin(x) = StartFraction 15.2 Over 9 EndFraction
sin(x) = StartFraction 9 Over 15.2 EndFraction
cos(x) = StartFraction 15.2 Over 9 EndFraction
cos(x) = StartFraction 9 Over 15.2 EndFraction
Answers
Answer:
cos(x) = StartFraction 9 Over 15.2 EndFraction
Step-by-step explanation:
That's it
Answer:
B. sin(x) = [tex]\frac{9}{15.2}[/tex]
Step-by-step explanation:
I trusted the other guy and got it wrong.
I hope this helps!
For the equation, 9x = 3y. Write an EQUATION describing y as a function of x
Answers
Answer: 9x + 3y = 12
Alternative forms: y = 0.4 OR y = [tex]2/3^{2}[/tex]
A toy store had 27,436 customers last week. Which digit is in the thousands place in 27,436?
A.2
B.3
C.4
D.7
Answers
Answer:
Your answer is 7 so it's D
Step-by-step explanation:
PLEASE HELP! I WILL MAKE YOU BRAINLIST!
Answers
Answer:
B.
Step-by-step explanation:
3.7 × 30 = 111
then round down to 110
a*b= 2ab find 2*4
please i need your help.
Answers
Answer:
16Step-by-step explanation:
solna*b=2ab2*4=2ab =2×2×4 =4×4 =16 answer
pls help! who ever solves first will be awarded brainiest!!! solve asap!
Answers
Answer:
[ ] = 3¹³
Step-by-step explanation:
3¹⁷ - 3¹⁵ + 3¹³ = [ ] x 73
3¹³ [3⁴ - 3² + 1] = [ ] x 73
3¹³ [81 - 9 + 1] = [ ] x 73
3¹³ x 73 = [ ] x 73
[ ] = 3¹³ [It says 3^13 if it is not clear/visible]
PLSSS HELP IF YOU TURLY KNOW THISS
Answers
Answer:
The answer is
→ [tex]A.)[/tex] [tex]2\frac{1}{4}[/tex]
Step-by-step explanation:
Option A is the answer because the line after letter B should be 2.5, and were talking about the one between 2 and 2.5. Which means that, Option A should be your correct answer.
Helpppp ASAPS i need your help i give brainlist to the correct answer only 2 and 3
Answers
Answer:
see
Step-by-step explanation:
1.
AD²+BD²=AB²
AD²+12²=15²
AD²+144=225
AD²=225-144
AD²=81
AD=√81
AD=9
2.
AC=AD+DC
AC=9+16
AC=25
3. I don't know what's the answer here.
Please give me brainlist.
y=x+1 x-y=1 solve by substitution
Answers
Answer:
No Solution
Step-by-step explanation:
You can use the expression for y provided by the first equation to substitute for y in the second equation.
y = x +1
x -(x +1) = 1
-1 = 1
There are no values of the variables x and y that will make this equation true. The system has No Solution.
__
Additional comment
Solving the second equation for y gives ...
y = x -1
This graphs as a line parallel to the line representing the first equation. A system describing parallel lines has no solution, because the lines never meet, and the solution is the point where they meet.
Answer:
no possible answer.
Step-by-step explanation:
1. y = x+1
2. x-y = 1
3. x = 1+y
Substitute equation 3 into the x in equation 1:
y = (1+y)+1
y = 2+y
y-y = 2
0=2
"0 = 2" isn't valid, thus there is no possible answer to this question.
8.
Two identical number cubes are shown in the picture. The edge length of these number cubes is 3 centimeters.
What is the combined volume of the two number cubes in cubic centimeters?
Answers
Answer:
I love it when you think I will answer with 0oop
Mark Bought a concert ticket for $88 then sold it for $121. By what percent did the price go up.
Answers
Answer:
33.5%
Step-by-step explanation:
First you need to subtract the amount he bought the ticket from the amount he sold it.
$121 ₋ $88
=$33
After that you need to divide the answer you got by the original amount of the ticket multiply it by 100.
33 ÷ 88 × 100
=37.5%
I hope this helps.
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Duing his leg, musher Charlie Olson’s sled overturned. He got frostbite trying to get his sled and the vials back together. Frostbite occurs when skin is exposed to temperatures -15ºF or lower for too long. At that point in the race, the windchill temperature was 55º colder than the warmest temperature at which frostbite occurs. What was the windchill temperature?
Answers
= - 70 °F
Find the curved surface area of a cone with base diameter 30 cm and height 40cm.
Answers
Answer:
the diameter of the base is 15cm. Find the curved surface area of cone. Solution: Given that, Slant height: l = 20cm
Slant = root of 30^2 + 40^2 = 50
Curved surface area = pi *r*l
pi*15*50
= 750*pi = 750*3.14
= 2355 cm ^2